Clooney told to "dump" Sarah Larson

Rex Features

An anonymous phone caller has told George Clooney to dump his girlfriend Sarah Larson, reports say.

The caller is alleged to have told Clooney: "Dude, your friends asked me to give you a message, 'Dump the b**** before you're sorry'."

However, Clooney insisted that his friends wouldn't play a prank on him.

"It's not a prank - none of my friends would do that," he said.

The 46-year-old has asked a police officer, who also acts as his chauffeur, to track down the man who made the call from a pre-paid mobile phone.

Pictures of Larson surfaced on the internet last week that showed her wearing a bondage outfit.

"They say that I'm a stripper," the 29-year-old said. "There's a ton of stuff about that. I've never been a stripper. You know, just because I'm from Las Vegas, I must be a stripper. Because I'm a cocktail server, that means I'm an escort."