Former Ireland, Leinster and British and Irish Lions prop Jack McGrath has retired from rugby at the age of 33 as he wants to live "a pain-free life".

McGrath earned 56 caps for Ireland and was part of the side that won the Six Nations in 2014 and 2015, as well as a Grand Slam in 2018.

The Dublin native was also part of the Lions' 2017 tour of New Zealand, winning all three of his caps as a replacement.

He has struggled with a persistent hip injury and had been without a club since being released by Ulster at the end of the 2021-22 season.

In a statement posted on his personal Instagram account on Thursday, McGrath officially brought down the curtain on his playing career.

"This decision has taken a considerable amount of time. It has been one of the hardest I've ever had to make," McGrath said.

"The last few years have been extremely testing for myself and my family, both mentally and physically.

"I feel I have given everything to my rugby career and I have no regrets or anything left to prove. It's been a long road of rehabilitation after two hip resurfacing operations.

"My main focus now is my family and I am excited for this next chapter with them.

"I am in a position now where I have a comfortable, pain-free life and can be an active dad, which I have chosen over going back to play rugby."

McGrath won three domestic titles, along with trophy successes in the European Challenge Cup and European Champions Cup, during nine successful years with Leinster, before joining Ulster in 2019, where appearances were limited.

Uncapped hooker Tom Stewart has been called up to the Ireland squad ahead of their Six Nations opener against Wales on Saturday.

Stewart has joined up with the squad in Portugal after Ronan Kelleher sustained a hamstring injury.

Ulster forward Stewart will provide cover while Kelleher is assessed as the top-ranked team in the world prepare to face Wales at the Principality Stadium this weekend.

Former Under-20 international Stewart played for Emerging Ireland in wins over the Griquas and the Cheetahs last year.

He was also involved in preparations for a clash between Ireland 'A' and an All Blacks XV two months ago.

Andy Farrell's side will continue to train in the in Quinta do Lago before flying to Cardiff two days before locking horns with Warren Gatland's men in the first match of the tournament.