Robert Pattinson is believed to have shot an extremely raunchy advert to promote fashion house Dior.

The actor was reportedly paid an estimated £8 million to strip off and have fun with three female models for the 'arty' men's clothing campaign, which will launch in May.

'The advert is sexually explicit. It is pushing the boundaries of what you can get away with in advertising,' says a source.

'Robert is topless for part of it and kissing one of the models with tongues. He really gets stuck in.'

Twilight star Robert, 26, is said to have filmed the saucy commercial shortly after on-off girlfriend Kristen Stewart admitted to cheating on him last July.

It seems he didn't mind performing a few racy stunts to keep his mind off snaps of Kristen frolicking with married Snow White And The Huntsman director Rupert Sanders.

'There's another scene where he takes part in a foursome in various states of undress, although it's not clear whether those scenes will make the final cut,' the insider tells The Sun.

'According to the people on set, he didn't take much persuading to get into the role. He got stuck right in.'