LOS ANGELES: Hollywood stars Robert Pattinson and Kristen Stewart who are rumoured to have ended their relationship for some time now, will soon announce their break-up, say reports.

The couple have apparently kept the news of their separation a secret because they didn’t want to affect the business of the ‘Twilight: Breaking Dawn Part 2’ DVD, to be out anytime now.

Buzz is that the famous couple, R-Patz and K-Stew as they are called, have been broken up for quite some time, but maintained public appearances so that the film (Twilight Saga) or its popularity with fans would not be affected.

“Rob & Kristen were asked not to announce a break-up or any relationship trouble until the DVD has been out for a few weeks and everything has sold. Since the first couple weeks are the times when the DVD will sell like wildfire. The more DVD’s sold, the more money for them. So they are abiding by the request,” shared an insider.

Most reports place their break up to their last public appearance at an award show after party. Robert has not even spent any time recently with his ex, since he’s been too busy shooting for his next project ‘The Rover’ in Australia. Their relationship has constantly been on the rocks ever since Kristen cheated on Robert with the ‘Snow White and the Huntsmen’ director Rupert Sanders, in spite of the Kristen’s public apology.

There also were rumors that the entire cheating scandal was just made up to gain popularity and create a boost to their careers. However reports say that Rupert Sanders, who recently ended marriage with wife Liberty Ross, put an end to that rumour.