Kristen Stewart.

Kristen Stewart strayed from boyfriend Robert Pattinson and was caught in a make out session cheating on Rob with Rupert Sanders, the man who directed her latest movie, 'Snow White and the Huntsman,' after they worked together.

Rob and Carey Mulligan will get very close in their next film project, will Kristen now worry, knowing her own history?

Pattinson and Mulligan have signed up to star in 'Hold On To Me' and her character will prey on Rob's in the film.

The 'Twilight' hunk and 'Drive' actress are set to star in the true crime drama, which will be led by 'Man on Wire' director James Marsh and produced by Alexandra Milchan, Mark Roybal, Steven M. Rales, Todd Field and Michael Pruss.

Brad Ingelsby wrote the screenplay, which is based on the true story of a young couple who kidnap and hold for ransom their town's richest man. However, the pair's plan falls apart when they decide to bury him alive.

Carey, 27, will play the femme fatale and Robert will star in a supporting role as Jimmy - Carey's alter-ego's true love who is not involved with the crime.

It is unsure when production will begin though according to Deadline, the Indian Paintbrush filmmakers are seeking funding at next month's American Film Market.

In the meantime, 26-year-old Robert can be seen in 'The Twilight Saga: Breaking Dawn Part Two', which is to be released in November.

Carey's next movie will see her star in upcoming drama 'The Great Gatsby' - a big screen adaptation of F. Scott Fitzgerald's 1925 book of the same name - alongside Leonardo DiCaprio, Tobey Maguire and Isla Fisher.

© Bang Showbiz