CNN: Does he use that to attract girls?
Jackman: This is very weird, but on some level, I'm kind of a wingman for my son, who's turning 13. This sounds very politically incorrect, but it's weird because most of the time, he doesn't want to talk about it with me. He doesn't talk about it much; he just wants me to be Dad. But I spotted him at the beach a couple years back, and he was talking to some girl who must have been 14 or 15. I was like, "Hmm ... like father, like son." And all of a sudden, he's pointing at me, and he walks over towards me. And he's sort of walking ahead of the girl, he's about 20 yards in front of the girl, and he's going, "Dad ... Wolverine. Just give an autograph, will you?" And I was like, "OK."
CNN: You sealed the deal for your son!
Jackman: For my then-11-year-old son! I know! If you see me in bars in about 10 years time, stop me!
CNN: Does the process of bulking up ever get tedious? I mean, there's muscles everywhere.
Jackman: I'll be honest with you, I kind of love it; I love the challenge of it. My personality is, 'I have to be in better shape than the last time." ... I feel really blessed to have the role, and I want to do it better every time, and so for me, the physicality of Wolverine is everything. I've realized it's preparation, it's time. Like in some of the old movies, you could see I didn't have time to prep. And I'm 44 now, so I need the time.
CNN: How much time did you spend getting ready?
Jackman: Three hours a day. I had a mentor, Dwayne Johnson, the Rock. We're mates, and I said, 'Mate, I need to know what you do." And he said, "Tell me you've got six months? ... You need six months to do this." He told me the diet -- 6,000 calories -- (and that) you have to train like no one else.
CNN: What does 6,000 calories a day consist of?
Jackman: It's six meals, with each meal having some kind of protein -- chicken, steak, fish, eggs -- a lot of it. Brown rice. If you're lucky enough, as you're bulking, you get brown rice or sweet potato. And then in the last month, I cut all the carbs out, and then it's a lot of steamed veggies. It's pretty plain, there's no salt, very little seasoning. And that's the big that gets hard.
This is what I learned: When I started, I used to think, "You want to be bigger? You want to be in better shape? Train harder, train harder, train harder!" It's not not (that), it's the food. Seventy percent of the way you look is your diet, 30% is your training. So if there's anything you've got to concentrate on, it's the food.
CNN: When you're done, what's the first thing you go for?
Jackman: Lasagna, ice cream, desserts, pizza ... All that stuff.
CNN: That's probably one of the happiest days of your life.
Jackman: So good. I love it so much. I eat pretty much everything.
"The Wolverine" opens in the U.S. on July 26.