Margot Robbie violently slapped Leonardo DiCaprio on the set of The Wolf of Wall Street.

The 23-year-old actress got caught in the moment while filming Martin Scorsese's new black comedy and accidentally hit her A-list co-star hard across the face, much to her horror. However, the 39-year-old hunk - who plays womanizing stockbroker Jordan Belfort - was impressed with her courage and asked her to do it again.

"I got a little lost in the moment. I slapped his face and said, 'F**k you!' There was a stunned silence then they all burst out laughing. I'd thought they were going to sue me. I apologized profusely but Leo said, 'That was brilliant. Hit me in the face again!'" she told GQ.

Meanwhile, Margot has admitted she finds it hard maintaining a slender figure for the cameras and tends to yo-yo diet because she can't resist fatty food. "I don't have a very good diet. I love beer, fries, burgers, but if I have to get in a bikini then I ear carrot sticks for three days. I'm one extreme or the other. I'm not good at doing moderation," the blonde bombshell joked.