George Clooney secretly filmed Evan Rachel Wood dancing to Justin Bieber.

The 24 year-old actress didn't know her moves were being recorded by the Hollywood heartthrob but she insists she doesn't take herself seriously and won't worry too much if her Ides of March co-star carries out his threat to make his footage of her public.

She told E!: "He did film me when I didn't think anybody was watching me dancing to Justin Bieber. And he said he was going to put it on the DVD, so I'm waiting to see.

"You know, you can't take yourself seriously all the time. You have to have fun, man."

George is known for his love of practical jokes and Evan admitted before they started work on Ides of March she was looking forward to meeting him because of his notorious sense of humour.

She previously said: "I'm excited for the practical jokes. Bring it on!"

Don Cheadle recently recalled a prank George played on his good friend Brad Pitt when they were working on Ocean's Eleven.

He explained: "He put a bumper stick on Brad Pitt's car that Brad couldn't see, reading, 'Honk if you love ****! Clooney is 11 years old."