Robert Pattinson fans are expected to boycott future films starring Kristen Stewart because she cheated on her 'Twilight' co-star. .

The actress - who plays Bella Swan in the 'Twilight' movies opposite Robert Pattinson's Edward Cullen - recently admitted she had cheated on her on and off-screen partner with her married 'Snow White And The Huntsman' director Rupert Sanders.

Now the breakup, which has seen the couple stop residing together at their Los Angeles home, is predicted to impact on her career.

'Kristen's the most hated woman in Hollywood. Female moviegoers have been looking for a reason not to like her and now they have it,' a film studio source told The Sun newspaper:

'Lots of Rob's huge army of female fans will boycott her films. It's going to be a long road for her to come back, professionally as well as personally.'

Kristen and Robert are currently locked in a bitter custody dispute over their dog.

The pairadopted Bear together from a high-kill shelter in New Orleans but now the furious actor has denied her access to the pooch.

'After Rob moved his things out of their Los Angeles apartment, he then told Kristen he wanted Bear,' a source said.

'She was heartbroken - they adopted Bear together and she always felt that he was their little baby.'

'But Rob was so hurt by Kristen's actions he decided that he wants the dog to help him get over what happened. After all, a dog is a man's best friend and Bear is such a good companion.'