Mischievous prankster George Clooney had a little fun with fellow actor Bruce Willis last week at Scott Caan's photography exhibit where he told him that older men were hitting on the 'Die Hard' star's 18-year-old daughter Rumer.

A source revealed that the ‘Ocean’s 13’ actor kept riling up the protective dad by telling him that several of the “middle-aged” male guests were hitting on his young daughter.

"Bruce kept getting madder and madder with each guy George mentioned," New York Daily News quoted a source as saying.

Unfortunately, Willis realized he was being taken for ride when Rumer came over and said, "Dad, George told me to tell you that — uh, I forget his name — was talking to me."