Seth Rogen needs his "fat clothes" back after putting on the weight he lost to play a super hero.

The comedy actor lost considerable bulk to play the titular character in comic-book adaptation movie 'The Green Hornet', but admitted since finishing the shoot he has ceased his tough exercise regime and wishes he hadn't given away his old clothes.

He explained: "I'm slowly outgrowing all the clothes I bought last year. It's a sad thing. I gave away all my fat clothes, thinking 'I won't need these anymore,' but I do!"

Asked by US magazine if there is a particular food which is causing the weight gain, Seth replied: "No. Just all of them!"

Seth,28, has previously claimed larger people should stay fat because weight loss is so difficult and admitted he didn't think he would be able to maintain his new shape because he gets emotional when he doesn't eat.

He explained: "I lost the weight for a role, but I don't know if I'll keep it off. That's the big question. I have a lot of tantrums. I want my food. I cry for no reason.

"I did not do any experimental injections! It's just diet and exercise. It works. Uh, stay fat, people. That's my motto. It's no picnic."