Hugh Jackman had to be gently told he was to portray a wolverine, not a wolf.

After playing Wolverine in nine movies, Hugh Jackman arguably knows more about the superhero than anyone. But that wasn't always the case.

He recalls researching the animal when he first got the role and being somewhat mistaken about the character. For one thing, he had no idea that a wolverine is a real creature.

"I didn't even know there was a wolverine. I literally, embarrassingly did about two weeks of research on wolves. I was rehearsing for three weeks and I was shooting, so I was kind of on my own. I remember going past an IMAX in Toronto, and there was an IMAX documentary about wolves, and so I thought, 'I'll go and see that,'" Jackman said Wednesday.