Sir Patrick Stewart has joked that he had to reprise his X-Men role, because Hugh Jackman wanted him to.
The 73-year-old, who returns to play Professor Charles Xavier in the upcoming X-Men: Days Of Future Past, admitted his Wolverine co-star needed him back during an appearance on Good Morning America.
"The reason is that Hugh just couldn't do it without me," he quipped.
Patrick, who last played the character in X-Men: The Last Stand, explained that the end credits of the 2006 film revealed how he is able to return.
"There's vaporisation and vaporisation. And clearly you didn't stay until the end of the credits," he said, rebuking host Robin Roberts. "In these movies, you've always got to stay until the end of the credits because there's always a little surprise, and that's why I am back in this movie."
Patrick and Hugh are among the cast members who will reprise their roles in Bryan Singer's upcoming movie, alongside the newer generation such as James McAvoy, Michael Fassbender, Jennifer Lawrence and Nicholas Hoult.
Hugh admitted that being around his younger co-stars sometimes made him feel his age.
"I have never felt older in my life than being in the trailer park, which we call the base camp, with these guys, because they were running around with BB guns, shooting at each other," said the 45-year-old.
"I was this far from going, 'You youngsters, stop that! This is very unprofessional'. I felt like the old guy, locking myself in my trailer: 'Please don't come and get me. Don't shoot me. I don't want to be shot'."
X-Men: Days Of Future Past opens in cinemas on May 22.