Keira Knightley

Age ain't nothing but a number.

The British actress gets real about mental health struggles and motherhood in a new interview.

But don't hold it against her.

From Brad Pitt to Marilyn Monroe, these movie stars got their start as extras or in bit roles.

Actors get real about what it’s really like to film a sex scene for a movie — and it's usually not as hot as you think.

You probably would never have guessed that these celebs are the same exact age.