Conor McGregor made history by becoming the first UFC fighter to hold championships in two weight classes at the same time, specifically in the Featherweight and Lightweight divisions. His achievements solidified his status as a dominant force in the world of mixed martial arts.

At the age of 12, Conor McGregor began boxing at the Crumlin Boxing Club in Dublin, developing a passion for the sport. He also showed interest in soccer and played it in his free time.

Conor McGregor showed interest in Mixed Martial Arts (MMA) after meeting with a future UFC fighter named Tom Egan in 2006.

On February 17, 2007, Conor McGregor began his journey in combat sports by making his fighting debut against Keirin Campbell, which he won. This marked the start of his professional career in the fighting world.

On March 9, 2008, Conor McGregor had his debut professional MMA fight as a lightweight, defeating Gary Morris with a second-round TKO.

At the age of 19, Conor McGregor won his first professional fight in the second round. This victory was a significant milestone in his career.

In 2012, Conor McGregor achieved a significant milestone by winning the Lightweight and Featherweight championships in Cage Warriors. This accomplishment showcased his exceptional skills and set the stage for his future success in the MMA world.

Conor McGregor made his UFC debut in 2013 against Marcus Brimage at 145lbs. McGregor dominated the fight and finished Brimage in one minute seven seconds, making a strong statement in the featherweight division.

Conor McGregor made his UFC debut on August 17, 2013.

Conor McGregor is injured and unable to fight for 10 months after his bout with Max Holloway. The injury forced him to take a break from fighting.

In December 2013, Conor McGregor got his famous chest tattoo. The tattoo became a recognizable part of his image as a UFC fighter.

Conor McGregor was set to face Cole Miller in his comeback fight at UFC Fight Night 46, but Miller withdrew due to a thumb injury. Diego Brandão replaced Miller, and McGregor defeated Brandão in the first round, earning his first 'Performance of the Night' award.

Conor McGregor fought Dustin Poirier at UFC 178, securing a victory in the first round with a left hook behind Poirier's ear. This win marked Poirier's first UFC loss via KO/TKO and earned McGregor his second 'Performance of the Night' award.

Conor McGregor faced Dennis Siver at UFC Fight Night 59, winning via TKO in the second round. This victory also earned McGregor his third straight 'Performance of the Night' award.

Starting on March 20, 2015, Conor McGregor and Jose Aldo embarked on a 12-day world tour visiting eight cities in five countries, including Rio de Janeiro and Dublin. The tour was part of the promotion for their upcoming fight.

In 2015, Conor McGregor predicted that Khabib Nurmagomedov would eventually hold the lightweight title, showing that Nurmagomedov had been on McGregor's radar for a long time.

UFC 189 was a mixed martial arts event where Conor McGregor faced Chad Mendes. McGregor won the fight by knockout or technical knockout with a punch in the second round at 4 minutes and 57 seconds.

Conor McGregor engages in psychological warfare with Jose Aldo Jr. leading up to their highly anticipated featherweight title fight. McGregor's tactics and mind games become a significant aspect of the pre-fight build-up.

Conor McGregor made his professional boxing debut on September 12, 2015.

On December 12, 2015, Conor McGregor faced José Aldo for the UFC Featherweight Championship. McGregor knocked out Aldo in just thirteen seconds with a left hook, ending Aldo's long title reign and win streak.

In January 2016, Conor McGregor's transition to the lightweight division was confirmed, with plans for a championship bout against Rafael dos Anjos, which eventually changed due to Dos Anjos' injury.

A press conference was held to promote the new main event between McGregor and Diaz, where both fighters traded insults.

During a face-off at the pre-fight press conference, Conor McGregor and Nate Diaz engaged in a brief scuffle after McGregor landed a strike on Diaz's lead hand.

UFC 196 was a mixed martial arts event where Conor McGregor faced Nate Diaz in a highly anticipated match.

McGregor was pulled from the event after failing to fulfil media obligations related to the fight, but the fight was rescheduled and took place the following month at UFC 202, where McGregor won via majority decision.

The UFC 202 event featured a highly anticipated rematch between Nate Diaz and Conor McGregor. It took place on August 20, 2016.

At UFC 205, Conor McGregor and Khabib Nurmagomedov had their first backstage altercation, hinting at the brewing tension between the two fighters.

Conor McGregor achieved the feat of becoming a double champion once again in his career. This accomplishment solidified his status as one of the top fighters in the UFC.

McGregor was stripped of the Featherweight Championship due to inactivity, leading to José Aldo being promoted to undisputed champion.

McGregor never defends his featherweight title after winning it with a 13-second KO of Aldo on Dec. 12, 2015. Instead, he opts to move up to welterweight to face Diaz in two epic bouts in 2016, losing the first and winning the second.

On June 14, 2017, it was announced that Conor McGregor would have his first professional boxing match against Floyd Mayweather Jr. on August 26, 2017. The fight took place at T-Mobile Arena in Paradise, Nevada, and was broadcast on Showtime PPV in the US and Sky Sports Box Office in the UK.

Fought in the second highest grossing boxing match in history against Floyd Mayweather, with 4.3 million PPV buys.

On November 10, 2017, at Bellator 187 in Dublin, Conor McGregor jumped the cage to celebrate his teammate Charlie Ward's win, causing chaos by confronting the referee, pushing a commissioner, and slapping another. His actions led to the fight being ended prematurely and received criticism from officials.

In April 2018, Conor McGregor and his entourage attacked a bus carrying UFC fighters at the Barclays Center in Brooklyn, New York. They threw various objects, including a hand dolly and a guard rail, causing damage to the vehicle and injuring multiple fighters.

On April 12, 2018, Conor McGregor hired lawyer Bruce Mafeo of Cozen O'Connor to represent him in the legal matters following the incident at the Barclays Center.

On September 12, 2018, Michael Chiesa announced a lawsuit against Conor McGregor, claiming he suffered pain, suffering, and a loss of enjoyment of life due to the attack at the Barclays Center.

Conor McGregor fought Khabib Nurmagomedov in a highly publicized fight at UFC 229. McGregor lost the fight via submission in the fourth round.

At UFC Fight Night: Volkan vs. Smith, Zubaira Tukhugov was scheduled to fight against Artem Lobov, a member of Conor McGregor's team. This event was significant due to the connection with the earlier UFC 229 incident involving Khabib Nurmagomedov and McGregor's team.

The Nevada State Athletic Commission announced a six-month suspension and a $50,000 fine for Conor McGregor, retroactive to 6 October 2018. McGregor became eligible to compete again on 6 April 2019.

On 11 March 2019, Conor McGregor was arrested in Miami Beach, Florida, for attacking a fan and smashing his cellphone. He was charged with strong-armed robbery and criminal mischief.

On March 26, 2019, Conor McGregor announced his retirement from mixed martial arts via Twitter, citing the end of his MMA career with a record of 21 wins and four losses. This decision surprised many fans and pundits in the combat sports world.

On April 6, 2019, McGregor was involved in an altercation where he assaulted a man at the Marble Arch pub in Dublin.

On August 15, 2019, TMZ Sports released a video showing Conor McGregor punching an older man at The Marble Arch Pub in Dublin. The incident occurred on April 6, where McGregor punched the man after he repeatedly declined a shot of McGregor's whiskey.

Conor McGregor returned to the Octagon after over a year and defeated Donald Cerrone via technical knockout in 40 seconds during the first round. This victory earned him a Performance of the Night award.

Conor McGregor announced his retirement from fighting once again.

On September 10, 2020, Conor McGregor was arrested on the French island of Corsica on suspicion of attempted sexual assault and indecent exposure in a bar. He was released without charge after two days in custody, and the investigation was later dropped due to insufficient evidence.

Conor McGregor fought Dustin Poirier in a highly anticipated rematch at UFC 257. McGregor lost the fight via TKO in the second round.

Conor McGregor faced Dustin Poirier in a rematch at UFC 257 but lost via technical knockout in the second round, marking his first knockout loss in his career.

Conor McGregor faced Dustin Poirier in the main event of UFC 264. The fight ended with a TKO due to a doctor's stoppage in the first round.

Conor McGregor underwent surgery on July 11, 2021.

On August 19, 2021, Conor McGregor had his boot removed less than six weeks into rehab, showing that he was ahead of schedule in his recovery from a fractured tibia.

On September 12, 2021, Conor McGregor was involved in a scuffle with Machine Gun Kelly, adding to the drama surrounding his comeback from injury.

Conor McGregor got into a public altercation with rapper/rocker Machine Gun Kelly at the MTV VMAs. This incident highlighted McGregor's tendency to attract media attention even outside of the fighting arena.

On October 17, 2021, Conor McGregor allegedly assaulted Italian musician and TV presenter Francesco Facchinetti in a nightclub in Rome, breaking his nose in front of witnesses and bodyguards. Facchinetti later filed charges against McGregor for the attack.

Reports surface about Conor McGregor's muscular physique, indicating he is in great physical shape.

Conor McGregor declares on Twitter that he has increased his power by over 50% after rehabilitating his injured leg by lifting heavy weights during the last 3 months.

Conor McGregor took to Twitter to announce his intention to face whoever holds the Lightweight title next. He also mentioned other fighters and hinted at a trilogy fight, showcasing his confidence and determination.

Conor McGregor shared a tweet showing him lifting 190lbs of granite as part of his training with McGregorFast. He mentioned targeting April to begin full-on MMA sparring.

On January 12, 2022, Conor McGregor's pub, The Black Forge Inn in Ireland, was targeted by criminals with a petrol bomb. Fortunately, there were no injuries or property damage. McGregor offered a cash reward for information leading to the identification of those responsible.

Conor McGregor is set to make his return to UFC after 904 days since he broke his leg at UFC 264. By the time of his fight, it will have been 1,085 days since he last fought.

Jorge Masvidal's manager encounters Conor McGregor in Ireland and observes McGregor's significant increase in muscle mass, prompting discussions about a potential fight between McGregor and Masvidal.

After taking time off for rehab and gaining weight, Conor McGregor sets his sights on UFC welterweight champion Kamaru Usman as his next opponent. McGregor expresses confidence in facing Usman and aims to become a triple crown champion.

On 22 March 2022, Conor McGregor was arrested in Dublin for multiple driving violations, including dangerous driving and driving without insurance or a license. His car was confiscated by the authorities.

Conor McGregor is charged with two counts of dangerous driving in Palmerstown. This incident raises concerns about his penchant for driving expensive and fast cars.

Conor McGregor acquires a Lamborghini yacht worth $3.5 million in Monaco, dubbing it 'The Supercar of the Sea'. This extravagant purchase showcases his lavish lifestyle.

In May 2022, Conor McGregor responded to Michael Chandler's callout to fight at 170 pounds after Chandler's victory over Tony Ferguson. McGregor accepted the challenge on Twitter, expressing interest in a future fight with Chandler.

A year after being named the richest athlete by Forbes, Conor McGregor's popularity and success start to decline as he falls off the Forbes top 10 list completely.

On 23 June 2022, Conor McGregor appeared in Blanchardstown District Court regarding the March 2022 driving incident. He was remanded on bail for further charges related to dangerous driving. The trial was rescheduled for July 2024.

Conor McGregor engages in a playful banter with Azerbaijani lightweight striker Rafael Fiziev, who invites McGregor to train at Tiger Muay Thai in Phuket. McGregor responds with colorful language, hinting at a potential fight.

Conor McGregor is set to make his acting debut in a reboot of the 1989 movie Road House, with Jake Gyllenhaal as his co-star. This announcement comes as a surprise to many, considering McGregor's background in fighting.

Conor McGregor tweeted a threat to twist retired boxer Carl Froch's head off, referring to him as having a 'scrawny pencil neck'. This tweet sparked controversy and speculation in the combat sports world.

Conor McGregor, in a surprising move, takes aim at Hasbulla, a popular figure in the fight game. McGregor's targeting of Hasbulla added a new twist to his ongoing controversies and feuds.

Speculation arises about a potential trilogy fight between Conor McGregor and Nate Diaz. Fans and the combat sports community eagerly await confirmation or further developments regarding this potential matchup.

After Islam Makhachev, a protege of his archenemy Khabib Nurmagomedov, wins the lightweight title at UFC 280, McGregor expresses his interest in facing both Makhachev and Khabib.

McGregor's friend and business partner Artem Lobov sues him over an alleged agreement and unpaid proceeds related to the Proper No. Twelve brand.

McGregor signals his readiness to return to fighting by declaring his intention to re-enter the USADA drug testing pool. This move hints at a potential comeback in August 2023.

Conor McGregor attempts to resolve a legal matter outside of the courtroom on November 29, 2022.

Conor McGregor reaches a resolution in a legal case through a court process on December 3, 2022.

Conor McGregor revives the feud with Dustin Poirier by threatening him on Twitter, saying 'I'm sending you off this earth'. This adds to the list of conflicts McGregor has with various fighters.

McGregor misses his court appearance in Ireland for dangerous driving, citing 'flu' as the reason. The use of quotes around 'flu' by reporters suggests skepticism.

In January 2023, Conor McGregor was accused of assaulting a 42-year-old woman aboard his yacht in Ibiza, Spain during his birthday party. The woman claimed she was berated and physically assaulted by McGregor, forcing her to jump from the yacht and sustaining a broken arm.

An Irish woman alleges that McGregor assaulted her on his yacht during a party in Ibiza. She claims McGregor kicked and punched her, leading her to jump into the water to escape.

UFC announces that Conor McGregor will be a coach on The Ultimate Fighter reality competition show's 31st season opposite Michael Chandler. McGregor and Chandler will also fight at some point in 2023. This marks McGregor's second time coaching on the show.

Conor McGregor introduces a new line of alcoholic beverages.

The woman who accused McGregor of assaulting her on his yacht in Ibiza decides to drop the civil action case against him after facing attacks on her home in Drimnagh.

McGregor fails to enter the USADA testing pool as promised, citing workarounds similar to Brock Lesnar's exemption at UFC 200.

USADA denies Conor McGregor's claims about his return timetable, leading to confusion and uncertainty among fans and the MMA community.

After watching José Aldo in a boxing match, Conor McGregor tweets about the idea of boxing against Aldo, sparking interest and speculation in the combat sports world.

McGregor suggests a boxing match with Jeremy Stephens, the fighter he famously mocked at a press conference in 2016.

McGregor confronts Mike Perry at the Bare Knuckle Fighting Championship event after Perry's victory over Luke Rockhold, expressing his willingness to fight Perry.

Conor McGregor expresses interest in potentially moving to WWE, calling out Paul Heyman and Roman Reigns. This comes after news of a possible merger between UFC and WWE.

During a press event at his restaurant in Dublin, McGregor shows interest in a boxing match with Canelo Álvarez, a four-division world champion.

Conor McGregor threatens YouTube star True Geordie during the airing of TUF 31's first episode.

During Game 4 of the NBA Finals between the Heat and Nuggets, Conor McGregor punches the Heat's mascot, Burnie, with a left hand, causing the mascot to be taken to the hospital for evaluation.

On June 11, 2023, Miami police received a report accusing McGregor of sexually assaulting a woman in a restroom at the Miami Heat arena after Game Four of the NBA Finals. McGregor denied the allegation through a statement released by the Kessler PR Group.

Three days after punching the Miami Heat mascot, McGregor claimed it was part of a skit and stated that all was well between him and the mascot. However, his actions had already stirred negative reactions from the audience.

Conor McGregor makes a distracting announcement, details of which are not provided.

A woman accuses Conor McGregor of sexually assaulting her in Miami after an NBA Finals game. This adds to a series of previous allegations against McGregor.

McGregor inserts himself into the conversation for the UFC's 'Baddest Motherfucker' title by challenging Justin Gaethje, just a day after Gaethje won the honorary BMF title by defeating Dustin Poirier at UFC 291.

McGregor was asked to leave his Aunt Pamela's funeral in Merseyside near Liverpool by his security team due to an altercation with other attendees. Specific details of the incident were not disclosed.

After Nate Diaz's loss to Jake Paul in a boxing match, Conor McGregor tweets about wanting to fight Diaz in a trilogy match, criticizing Paul's performance and expressing his desire to face Diaz.

After the Anthony Joshua-Robert Helenius boxing match, McGregor challenges social media star/boxer KSI to a bare-knuckle fight. He taunts KSI by questioning his boxing skills in a public call-out.

Conor McGregor announces on Twitter that he will not be able to fight in December 2023, expressing frustration over feeling restricted from pursuing his career due to a perceived injustice. He references Chris Weidman's comeback from a serious injury as a point of comparison.

Conor McGregor stirs up an old feud or conflict with a past opponent, hinting at potential future confrontations or challenges in the world of fighting sports.

McGregor takes aim at featherweight champion Alexander Volkanovski, expressing his displeasure with Volk's status as the no. 1 pound-for-pound fighter in MMA and hinting at a potential future fight.

Following Sean Strickland's victory over Israel Adesanya for the UFC middleweight title, McGregor hints at a possible move to the 185-pound division, showing interest in competing in that weight class.

On October 11, 2023, Conor McGregor re-enters the USADA testing pool, indicating his preparation for an upcoming fight.

The UFC holds a press conference to address USADA's claims, with UFC executives defending the organization and Conor McGregor against allegations.

Charges are dropped in McGregor’s Miami assault case due to insufficient evidence. The bathroom attendant at the Kaseya Center for Game 4 of the NBA Finals mentioned in a closeout memo that he did not hear any signs of distress. Conor's attorney expressed relief that the episode is now over.

On October 18, 2023, the case regarding the sexual assault allegation against McGregor was dropped.

On November 23, 2023, McGregor made anti-immigration statements in response to the stabbing incident in Dublin. He condemned the riots that followed the stabbings and criticized political figures for their views on immigration.

Conor McGregor finally announces his next fight after teasing fans all week. The fight is set to take place in Las Vegas for International Fight Week on June 29, 2023, against Michael Chandler at 185 pounds.

Conor McGregor's trial, initially planned for January 2023, was postponed to 31 July 2024 after his defense cited health reasons for his inability to attend. The trial concerns multiple driving charges against McGregor.

Conor McGregor experienced a defeat in 2027, impacting his career.