George Clooney has followed through on his pledge to take revenge on pal Matt Damon following a public gay joke - he convinced the actor he was gaining weight when he was on a strict diet.

The Bourne Identity star recently admitted he fueled gossip Clooney was secretly in love with another man, by telling a reporter that the couple planned to marry.

Clooney vowed to get his own back on the 39 year old for the prank - and he was given the perfect opportunity when the Damon family visited his Italian villa over the summer.

Damon was attempting to get back in shape after he piled on 30 pounds for his role in The Informant!, and was eating nothing but salad and working out daily in the gym.

But Clooney had secretly employed a woman to take in the waistband of all Damon's trousers every day by an eighth of an inch - convincing him that his hard work was all in vain.

He says, "He couldn't understand how he seemed to be gaining weight while he was trying so hard to lose it."

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(This news article provided by World Entertainment News Network)