Mary-Kate Olsen: 'Kissing Ben Kingsley Didn't Bother me'

Mary-Kate Olsen says she wasn't bothered about kissing Sir Ben Kingsley -- even though he's 42-years her senior.

The famous twin, 22, had to get physical with the 64-year-old screen legend for her latest movie The Wackness, but wasn't wracked with nerves.

And even though Kingsley is old old enough to be her granddad, Mary-Kate says she was so worried about acting opposite her idol she completely forgot she had to film a love scene with him.

She explains, "It is all part of being an actress.

"But I was so in awe of Sir Ben I was more nervous about acting alongside him than I was about the kiss."

Co-star Ben said at the Sundance Film Festival, "Mary-Kate's portrayal of this girl [Union] is perfect - she's hysterical. She's a pro. It makes sense. She's been in this business a lot longer than I have."