Hollywood actor George Clooney was called a 'dirty old man' by the children of his Ocean's Thirteen co-stars, it has been revealed.

Gorgeous George claims that on the set of the sequel he was surrounded by Brad Pitt and Matt Damon's kids, who use him as a play pal and call him a 'dirty old man'.

"(They call me) Dirty man, dirty old man. Usually they hit me in the head with a water balloon and then run off laughing," Clooney was quoted as saying.

However, Damon insists that the lighthearted and playful Clooney is an outstanding babysitter.

"It all works out, he fits in with the kids. It usually tends to be, 'Let me dump a bucket of water on your head and then I'm going to watch how you react.' And then they go, 'George is fun!'" Damon said.

Meanwhile, ever the jokester, in an interview Clooney called Angelina Jolie is a "horrible" and "ugly" person.

In an interview at Cannes, Clooney and Matt Damon joked "Brad has had it tough" between being "hobbled with children" and "that horrible, ugly wife." Clooney went on to say that Brad should just kill himself to get out of the horrendous situation.

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