Practical joker George Clooney played a prank on his father by dedicating his latest film to his memory even though he's still alive.
The Hollywood star invited his father, a former TV journalist, to a special screening of Second World War film The Monuments Men.
Matt Damon, who co-stars in the film about a group of art experts searching for stolen paintings, told Graham Norton that Clooney was always playing pranks.
He told the chat show host: "To give you an example, his dad is in the movie and George runs it just for him. As the credits rolled, it said, 'In loving memory of Nick Clooney'.
"His dad says, 'What the hell, George?', and George goes, 'Well dad, the movie doesn't come out for six months. It's much cheaper to take these things off the credits than put them on!'.
"So that's who you're dealing with and you have to understand that going into a movie. It is so funny to him."
The Monuments Men co-stars Australian Cate Blanchett, John Goodman, Bill Murray and Downton Abbey star Hugh Bonneville. It opens in Australian cinemas on March 13.
