Actress Sienna Miller hates stripping off on-screen - because she can't stand the idea of her father seeing her naked.

The blonde beauty worries so much about her beloved dad seeing her in steamy scenes, she warns him to cover his eyes when she appears undressed. She says, "I get embarrassed, especially if my dad watches them. I get embarrassed watching them myself. But sometimes you just have to do it."

However, the British star insists on performing realistic sex scenes - by refusing to wear a bra in bed. Miller explains, "It has to be realistic and I think it is probably very rare that people have sex with their bra on so if you are going to do it, just do it. That's my motto."

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(This news article provided by World Entertainment News Network)