Jessica Alba has damaged her teeth while filming a romantic scene in her new movie Good Luck Chuck.

The actress chipped a molar during a kiss with co-star Dane Cook and claims she now looks "silly" if she takes off a protective covering from her teeth.

Talking about the accident, Alba told The Sun: "It was just a case of Dane and I going at it during a kissing scene and we both collided and I chipped a tooth.

"I now have a bond on my tooth but when I take it off, I look like Jim Carrey in Dumb and Dumber. I look really silly. I guess I’d be perfect for a sequel."

The Fantastic Four star added: "When it happened, I didn’t really cry and I wasn’t really mad about it. I was like, ‘Cool!’ It’s kind of neat. I get to take this thing off and be somebody else for a little while."