Pamela Anderson reportedly refused to act alongside a dog in her new film.

The animal rights campaigner was upset when she discovered she would be starring alongside the canine in 'Superhero Movie', because the scene goes against PETA's guidelines for using real animals in movies.

A movie insider said: "Pamela left the set and went for a walk. She needed a time out. She was that upset."

In the scene, Pamela's Invisible Girl character was required to call for her Invisible Dog, who only becomes visible as it is picked up by the busty blonde.

Even though director Craig Mazin worked around the actress' refusal by piecing together some shots of the dog that were filmed when the actress wasn't around, the scene failed to make the final cut.

The Motion Picture Association of America's Ratings Board disapproved of a bestiality joke in the scene which suggested the dog had been sexually satisfying a superhero professor.

Pammie has a strong connection with PETA, and even stopped wearing her beloved UGG sheepskin boots after she realized they were made from animals.

She wrote on her blog: "I'm getting rid of my UGGs. I feel so guilty for that craze being started around my 'Baywatch' days - I used to wear them with my red swimsuit to keep warm - never realizing that they were SKIN!"

"I thought they were shaved kindly. People like to tell me all the time that I started that trend - yikes!"