Charlize Theron embarrassed over sex with real boyfriend

Oscar-winning actress Charlize Theron is mortified with her latest film role - which contains a scene of her having sex with her real-life boyfriend.

The 29-year-old beauty stars alongside beau Stuart Townsend in 'Head in the clouds', a war romance with an intense sex scene.

The Hollywood couple have been dating since 2000, but Theron never imagined they'd get naked in front of cameras for everyone to see.

She says: "I think at some point I said, 'I can't wait for my mum to see this film,' and Stuart got extremely nervous."

The star admits it was very embarrassing for them both, as well as for her friends and family.

She says: "It's a little odd when you have people who know you, and we've been in a relationship for four years so a lot of people do know us, and to do something like that, no matter how well you play the character, is a little odd for them, I'm sure."

Official Charlize Theron Website