Hugh Jackman has said that years of playing Wolverine has damaged his vocal chords.
The star took on the role back in 2000 and went on to star in multiple films but it seems that it's had a negative impact on him physically.
Repeatedly doing the superhero character’s growl has taken a toll actor’s real voice, which he says is now "damaged" as a result.
The star said his drama teacher would be "horrified" if they knew some of the things he's done to his voice through his career.
Hugh said: "I’ve done some damage to my voice with Wolverine."
Jackman said on BBC Radio 4’s Front Row : "My falsetto is not as strong as it used to be and that I directly put down to some of the growling and yelling. My voice teacher in drama school would’ve been horrified by some of the things I did [in Wolverine]."
Wolverine tends to roar when his claws are coming out.
He explained: "We learned a technique [in school] of how to shout and how to yell without ruining your voice. However, during Wolverine, I did some screaming and yelling and things that I think did damage to my voice."
"I’m working on it. I work with a singing teacher and I try not to hurt myself. I put a lot of effort into both physical movement and my vocal preparation for every role," Hugh added.
Despite the toll his Wolverine character took on his voice, Jackman has managed to score multiple roles in his career that have required singing.
The Aussie recently completed nearly a year-long stint on Broadway in The Music Man.
He also starred in The Greatest Showman, with the soundtrack earning him a Grammy nomination.
He was also involved in the hit 2012 musical Les Misérables.
As well as pushing his voice while paying Wolverine, Jackman also got into shape.
He recently denied ever using steroids to play the role.
In HBO’s Who’s Talking to Chris Wallace, Hugh said: "No, I love my job. And I love Wolverine. I got to be careful what I say here, but I had been told anecdotally what the side effects are of that. And I was like, 'I don’t love it that much.' So, no, I just did it the old-school way."