Josh Hartnett is worried that his family will be shocked by a racy moment in his new movie The Black Dahlia.

Admitting that he was apprehensive about filming a sex scene with Hilary Swank, he told The Sun: "I didn’t react to it well and so I don't expect them to.

"Hilary took off her clothes and got into bed and I was like 'Well I guess I have to do that too.'"