Pattinson and Stewart are to shoot some "hot love scenes"
The couple appear alongside each other in the vampire film franchise, and there have been repeated rumours they are more than just friends since the first movie was released in 2008. Robert finally admitted they are in a relationship earlier this year, but both have politely refused to reveal the intimacies of their romance.
The fourth film, The Twilight Saga: Breaking Dawn, is due to start shooting later this year, and insiders claim the chemistry between Robert and Kristen will be obvious. The pair play vampire Edward Cullen and Bella Swan respectively, a couple who are attracted to each other but whose relationship is fraught with difficulties. "Expect their love scenes to be blazing hot," a source told the American edition of OK! magazine. "They-re as excited to be working together as the fans will be to see them. The idea of spending everyday together on set is a dream come true for them."
Robert and Kristen recently had to re-film segments of upcoming movie Eclipse in Vancouver, Canada. Despite reports they got into a fight on set, movie workers insist they actually got on well and enjoyed their time together. "Kristen spent all her down time in Rob-s trailer," one explained. "Their relationship has never been better and they-re more in love than ever!"
Meanwhile, it has been claimed Robert is keen to win the lead role in the big screen adaptation of novel Kill Your Friends, about record label A&R man Steven Stelfox who takes drugs, sleeps with prostitutes and commits murder.
The book, by John Niven, has been likened to American Psycho, and Robert is said to be desperate to land the starring role.
"Rob is a huge fan of the novel. He is fascinated by the music industry and is keen to get involved in the project," a source told British newspaper The Sun. "He`s already approached producers telling them he wants to play the leading man. If he gets the role it would be the darkest part he`s ever played."