Rihanna has landed a part in an X-rated Hollywood movie alongside Samuel L Jackson.

The Umbrella hitmaker who has signed-up with a top agent at William Morris will play a super sex, super kinky dominatrix in 'The Last Dragon'.

"She has landed an incredibly challenging role alongside Samuel L Jackson". the Mirror quoted a source as saying.

But it's not a part for the faint hearted. "She has been told to research the part and this could well include a trip to an S&M dungeon.