Keira Knightley didn’t hesitate when she was asked to bare her breasts in new movie ‘The Edge of Love’ because she believes sex scenes are more believable when performed by naked actors.

Sienna Miller, Matthew Rhys and Keira Knightley “The Edge of Love” photocall at the 62nd Annual Edinburg Int’l Film Festival last week

more photos after the jump…

In an interview about her new film, ‘The Edge of Love’, Knightley: “I am always exposing my breasts!”

And so that is exactly what happened on the set. Keira was in a hot scene with her onscreen husband Cilian Murphy: “It was a sex scene, and I didn’t want to act in it if I was wearing my bra.”

Appearing in the buff isn’t a problem for Keira but she does have her inhibitions. Keira: “In the scenes where I had to sing, my knees were trembling. I thought I would just die.”

photos: PR Photos

In ‘The Edge of Love’, Knightley appears alongside Sienna Miller. Their characters live with poet Dylan Thomas (Cilian Murphy) in a love triangle, and go on a journey into the Bohemian lifestyle of London in the 1940s. – BILD