Sienna Miller's virginity confession

Sienna Miller lost her virginity at 16.The 25-year-old actress had her first sexual experience in her bedroom, because her mother insisted she experimented with her boyfriend under her roof.She said: "I had my first serious boyfriend when I was 16 and my mother made sure I brought him home."She didn't want me doing it outside and would say, 'I'd rather you did it in my house if you're going to do it at all.'"It was a very open household but I only brought home guys I really liked."My mother was very warm and accepting of anything we got into as children."Sienna recently revealed she was determined to make the sex scenes with her 'Factory Girl' co-star Hayden Christensen as realistic as possible.

She said "I believe that there's nothing worse than seeing a sex scene where someone's got a T-shirt on because it's unrealistic. So I think that if you're going to do it, do it.

"I watched it thinking, 'Oh my God, my dad's going to see it!' But it was relevant to the story in that it's a movie about the 1960s, and sex, drugs and rock and roll were a big part of that."

The scenes are so explicit it was rumoured that the actors actually had real sex. Sienna has strongly denied the allegations.