Ben Kingsley and Mary-Kate Olsen
Dara Kushner/INF; Eric Charbonneau/WireImage
He's a screen legend – heck, he's even been knighted! But Sir Ben Kingsley isn't above a little kiss-and-tell when it comes to his on-screen smooch with 22-year-old Mary-Kate Olsen
in The Wackness
"She was completely in charge," the actor, 64, tells PEOPLE of their enthusiastic make-out scene in a telephone booth.
The former star of Gandhi
and Schindler's List
– who's currently shooting with Martin Scorcese in Boston – drove down to New York for the movie's Cinema Society and Sony Cierge-sponsored party at the Gramercy Roof Club.
"I love watching the movie," his wife, Daniela, said of the coming-of-age stoner film. As for her real-life leading man, she added, "I love him. He's amazing."
Writer/director Jonathan Levine said that although he was never a drug dealer, the film is loosely based on his own experiences growing up in New York. And even with this all-star cast, Levine still passed along a few valuable lessons.
Most notably? "I did have to teach Sir Ben how to take a bong hit."