Zac Efron jokingly tweeted that if he wins the Best Shirtless Performance MTV Award he would accept it topless, and he plans to stand by his word.

The That Awkward Moment star is up against Chris Hemsworth, Leonardo DiCaprio, Jennifer Aniston and Sam Claflin in the category and tweeted, "If I beat Thor – I'm accepting the award shirtless on stage #movieawards"

Efron has since told MTV, "So I jokingly tweeted, if I beat him I'll accept it shirtless. Now I have to. I'm a man of my word. If I win, I'll do it."

The MTV Movie Awards take place in Los Angeles on Sunday.