Conor McGregor celebrated his historic triumph at UFC 205 in the best possible way after he confirmed that he and girlfriend Dee Devlin are expecting their first child in May next year, triggering speculation that the Irishman could end his mixed martial arts career.

McGregor delivered one of his most punishing performances in the early hours of Sunday morning when he knocked out Eddie Alvarez in the second round of their lightweight title fight, adding the 155-pound belt to the featherweight championship that he already held.

The fight represented McGregor’s third different weight category in four bouts, after beating Jose Aldo at UFC 193 at 145-pounds before his back-to-back meetings with Nate Diaz at UFC 196 and 202 at the welterweight limit of 170-pounds.

The 28-year-old teased a big announcement in the build-up to the fight, and after revelling in the glory of holding two UFC belts at the same time in front of a partisan Irish crowd, he confirmed that he and Devlin are expecting a baby next year.

“I'm going to be a daddy early next year. I'm crapping my jocks!” said McGregor in his post-fight press conference at Madison Square Garden in New York, where he momentarily forget the due date as he claimed their child will arrive in March before being informed it’s actually May.

"It's going to mess with my head. I just want to have this baby and take some time.”

However, McGregor went on to claim he needs a good offer to come back to the Octagon, and even claimed that part of that offer would be a share in the UFC brand due to his worth that has spiralled upwards over the last three years.

“I've got a family now, so I want ownership. I want an equal share,” McGregor added. “Whoever owns this company needs to come to me and give me a real slice. Bring me in on this for real. Make me an owner. I need to be set for life."

UFC 205 Conor McGregor vs Eddie Alvarez Show all 28 1 /28 UFC 205 Conor McGregor vs Eddie Alvarez UFC 205 Conor McGregor vs Eddie Alvarez Conor McGregor vs Eddie Alvarez Conor McGregor walks out of UFC 205 the first simultaneous two-weight world champion. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Conor McGregor vs Eddie Alvarez McGregor celebrates his KO win over Eddie Alvarez UFC 205 to hold the lightweight and featherweight titles. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Conor McGregor vs Eddie Alvarez McGregor became the first man to hold two different belts in UFC history. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Conor McGregor vs Eddie Alvarez McGregor continues to set the benchmark in the UFC. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Conor McGregor vs Eddie Alvarez Referee John McCarthy waves off the main event after Alvarez is floored for a fourth time. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Conor McGregor vs Eddie Alvarez McGregor utilised his left hook counter to floor Alvarez three times in the first round. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Conor McGregor vs Eddie Alvarez McGregor taunted Alvarez by holding back hands behind his back and urging him to throw a punch. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Conor McGregor vs Eddie Alvarez Alvarez had no answer for McGregor's speed and power. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Tyron Woodley vs Stephen Thompson Tyron Woodley retained his welterweight title by majority draw against Stephen Thompson. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Tyron Woodley vs Stephen Thompson Thompson survived a barrage of punches as well as a long gullotine choke hold. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Tyron Woodley vs Stephen Thompson Thompson was busted open on the bridge of his nose in the first round. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Tyron Woodley vs Stephen Thompson Woodley floored Thompson and dominated the opening round but Thompson would fight back. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Joanna Jedrzejczyk vs Karolina Kowalkiewicz Joanna Jedrzejczyk was pushed all the way by fellow Pole Karolina Kowalkiewicz. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Joanna Jedrzejczyk vs Karolina Kowalkiewicz Jedrzejczyk dominated Kowalkiewicz for the first three rounds before the tables turned. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Joanna Jedrzejczyk vs Karolina Kowalkiewicz Jedrzejczyk remains the strawweight champion. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Chris Weidman vs Yoel Romero Chris Weidman suffered a brutal defeat after catching a flying knee from Yoel Romero. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Chris Weidman vs Yoel Romero Romero's flying knee split Weidman's head wide open to end the fight. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Miesha Tate vs Raquel Pennington Miesha Tate announced her retirement after defeat by former apprentice Raquel Pennington. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Miesha Tate vs Raquel Pennington Pennington dominated Tate for the entire three rounds. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Miesha Tate vs Raquel Pennington New York Giants wide receiver Odell Beckham Jr was at ringside for the bout. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Frankie Edgar vs Jeremy Stephens Frankie Edgar got back to winning ways by defeating Jeremy Stephens. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Frankie Edgar vs Jeremy Stephens Edgar dominated Stephens but was rocked badly in the final round. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Khabib Nurmagomedov vs Michael Johnson Khabib Nurmagomedov immediately called out Conor McGregor after defeating Michael Johnson by submission. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Tim Boetsch vs Rafael Natal Tim Boetsch knocked out Rafael Natal in the first round. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Vincente Luque vs Belal Muhammad Vincente Luque beat Belal Muhammad inside 90 seconds. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Vincente Luque vs Belal Muhammad Luque caught Muhammad with a counter left to end the bout. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Jim Miller vs Thiago Alves Jim Miller beat Thiago Alves in the early preliminaries. Zuffa LLC via Getty UFC 205 Conor McGregor vs Eddie Alvarez Liz Carmouche vs Katlyn Chookagian Liz Carmouche beat Katlyn Chookagian in the early preliminaries. Zuffa LLC via Getty