"She quite liked it," Jackman, 48, told ET's Carly Steel, "which gives me hope because I had to wear a wig for the old salt and pepper. I'm good for another 15 years I think."
In the film, Wolverine (Jackman) is caring for an ailing Professor X (Sir Patrick Stewart) near the Mexican border when a young girl named Laura (Dafne Keen) shows up with powers that are eerily similar to the clawed mutant. Wolverine (aka Logan) must defend the girl from the dark forces pursuing her.
The movie is reportedly the last Wolverine film Jackman will star in after originating the character on the big screen 17 years ago, and the actor didn't want to walk away with any regrets.
"There is not a frame of this film where I can't say I didn't put everything into it," Jackman said. "I couldn't have made this film if I didn't make the decision within myself that this was the last one. I just didn't compromise on anything. I was a pain to a lot of people, because I don't get another shot at this. This is a character I love. I owe my career to this character."
Stewart on the other hand, is still up for more.
“Hugh has raised the flag that says goodbye. I haven’t done that yet,” Stewart said.
Many things have changed in the 17 years since the first X-Men movie, and Stewart reflected on the ways in which Jackman is different than when he first met him, as well as the qualities that remain the same.
"His charm and modesty and likeability has never changed,” Stewart said. “What has changed is the actor. His work throughout the franchise is compelling and powerful and witty and very entertaining, and I believe what he does in Logan is quite extraordinary. The aging, the sadness, the weariness, the borderline despair he exhibits coupled with that edge that has always been there is quite remarkable."
While Jackman is hanging up his claws, his 12-year-old co-star, Keen, is just getting started.
"That was one thing I was a pain about," Jackman admitted. "I was like, 'Dude, this is the greatest idea, but how are we going to pull this off? How do we find that girl?' And we did."
Stewart also sang Keen's praises.
"She is a phenomenon," the 76-year-old star marveled.