The 44-year-old Jackman relied on his Hollywood friend to help him bulk up to reprise the titular role in new superhero movie 'The Wolverine', reported Contactmusic.
"I called my buddy The Rock for tips. I lost weight doing 'Les Miserables'. He said, 'Here's the deal - three hours in the gym and 6,000 calories, eating very lean. You gotta do that for six months.' I did it and let me tell you, The Rock is crazy! He is insane. But we did it and the results are there," Jackman said.
"Let me just say, I will not be eating chicken breasts for lunch anymore.