Brad Pitt has warned George Clooney not to "harm the children" when he carries out his next prank.

The Hollywood actors have been friends for many years and are both known for their high jinks on movie sets. Brad recently revealed that he has a "brutal" hoax up his sleeve to play on George. Brad also claimed it has been "in his pocket" for about five years.

George responded to Brad's challenge at the Screen Actors Guild Awards on Sunday, and admitted that the upcoming Oscars could be the perfect place for the pair to launch their next attacks on one another.

"It could all go down then. I hope not because I really do have him and it could be bad," he told Extra, before girlfriend Stacy Keibler added she knew about the upcoming prank. "I do [know] but I'd never say a word!"

"Brad has said to me, 'Just don't harm the children' and that seems fair," George added.

Brad raises six children with partner Angelina Jolie.

George and Stacy went on to discuss their red carpet fashion. George looked as dapper as ever in a black suit, while Stacy stunned in a floor-length black gown.

"This is the best part for me I just like looking at everyone's dresses! I'm in Marchesa," the blonde beauty revealed, before the interviewer asked what the couple talked about before leaving the house.

"She says to me, Are you wearing Marchesa too?" George deadpanned.

George also discussed his life pre-Hollywood. The star admits he was far less glamorous a few years back.

"My first job was a movie called the Predator, not the other Predator one that never came out," he smirked.

"My first paid job was mowing lawns. I was probably about 10 or 11."