Liam Hemsworth thinks Miley Cyrus would beat him in 'The Hunger Games'.

The 22-year-old actor -who plays Gale Hawthorn in the new movie that sees teenagers forced to fight to the death - believes his 19-year-old girlfriend would outsmart him at every turn.

Asked who would win he said: ''Probably her. She's a tough girl, that one.''

The movie - based on the trilogy of books by Suzanne Collins - has already attracted a mass following, and Liam has turned to Big Brother and 'Thor' star Chris, 28, for advice on how to cope with the mania.

Speaking at last night's (13.03.12) Los Angeles premier, Liam told People Magazine: ''It's like a good punch to the head. My brother had somewhat been through it and he's always been a big role model in my life. I try to take as much knowledge from him as I can.''

Miley - who he met on the set of 'The Last Song' in 2010 - says she was thrilled to see such adoration for her beau.

She added: ''I think it's just so amazing to have all these fans out here and see how excited they are for him and how excited I am for him.''