By Rachel Williams in New York
via news.com.au

Pamela Anderson's estranged husband Kid Rock was reportedly furious with the star over her appearance in the Borat movie.

Anderson, who has filed for divorce from the musician after just four months of marriage, had a cameo role in the hit film as the fictional Kazakh journalist's dream woman.

Borat, played by comedian Sacha Baron Cohen, falls in love with the actress after seeing an old episode of Baywatch and drives across America to propose to her.

Unlike most of Cohen's other targets, Anderson was in on the joke.

But Rock, whose real name is Bob Ritchie, did not find it funny, according to the New York Post.

Universal Studio chief Ron Meyer's held a screening of Borat at his house for a group which included the couple two weeks ago, the newspaper reported.

"It was the first time Bob had seen the movie, and, well, he didn't like it," a friend of Anderson told the Post.

"Bob started screaming at Pam, saying she had humiliated herself."

The friend added: "It was very embarrassing. Pam thought he could have a sense of humour about the movie.

"She was in on the gag from the very beginning and loved doing the movie.

"And on the eve of what was supposed to be a very positive thing, he made it an awful night."

Rock's spokesman did not return the Post's calls, while Anderson's manager declined to comment.

Yesterday it emerged that both stars had filed for divorce citing irreconcilable differences.

Anderson, 39, wrote on her website: "Divorce. Yes, it's true. Unfortunately impossible."

Earlier this year she suffered a miscarriage in the early stages of pregnancy.

Friends of the couple expressed support - and in some cases surprise - after the news.

Denise Richards, who has just finished filming Blonde and Blonder with Anderson in Vancouver, told People: "My thoughts are with her and her boys.

"Pam is a very strong woman and will get through this difficult time."

Traver Rains and Richie Rich, designers who made Anderson's wedding dress, said they were caught off guard by news of the divorce.

"Maybe it's a spat," Rich told the magazine.

"They're so in love, and I'd be surprised if it was over forever. I don't think she'd let her prince go."

He added that he spoke to the actress recently and she showed no signs that anything was wrong in the marriage.