Actor Laurence Fox agonised over filming 2001's The Hole with Keira Knightley - because he had to act out a love scene with then then-teenage star.
The 29-year-old, who made his professional debut in the British thriller, felt uneasy getting intimate with Knightley, and his hesitation even prompted director Nick Hamm to question his sexuality.
He recalls, "She was really clever. That's what I remember about her - and that I had to sort of slightly molest her at some point in the film and feeling really uncomfortable about doing it, because she was 15 and I was 23.
"The director asked me if I was gay and was that the problem, and I was just like, 'No, that's not the problem: I just feel a bit like I'm molesting one of my little brother's friends.'"