Natalie Portman has already lost one fan — her father — because of her hot lesbian sex scene in her upcoming movie Black Swan.

Father Avner Hershlag, a doctor in Israel who has always been close to his daughter, is now said to be “very frosty” over the scene in the psychological thriller.

Natalie, 29, who plays a lesbian ballerina, has a heated sex scene with co-star Mila Kunis.

Director Darren Aronofsky, best known recently for his dark drama “The Wrestler,” now focuses on competing ballerinas, who share a love hate relationship — and highly-anticipated kiss in the film.

Portman is not known for sexually explicit roles. In fact, she turned down a turn as “Lolita” about an under-aged girl’s sexual relationship with an older man.
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“Natalie is a very private and dignified person and is often influenced by her father’s approval,” a source told London’s Daily Mail.

“This, however, was one role she simply didn’t want to turn down even though she knew it would upset her father.

“He still sees her as his baby and always will and thinks showing herself like this is degrading.

“Things are very frosty between them right now,” the source said.

The film premiered at the Venice Film Festival in September and will hit theaters Dec. 1. Studio Fox Searchlight Pictures released the first trailer in August.

The film, which also stars Vincent Cassel, Barbara Hershey and Winona Ryder focuses on Nina (Portman), a New York City ballerina who is completely obsessed with her profession.

She lives with her retired ballerina mother Erica (Hershey) who zealously supports her ambitions.

When artistic director Thomas Leroy (Cassel) decides to replace prima ballerina Beth MacIntyre (Ryder) for the opening production of their new season, Swan Lake, Nina is his first choice.

(Click photos to see them full size!)

But not if new new dancer, Lily (Kunis) has anything to say about it. She’s at the top of Leroy’s list as well.

Swan Lake requires a dancer who can play both the White Swan with innocence and grace, and the Black Swan, who represents guile and sensuality.

Nina fits the White Swan role perfectly, but Lily is the personification of the Black Swan.

As the their rivalry grows into a twisted friendship, Nina begins to get more in touch with her dark side, egged on by Lily, with a recklessness that threatens to destroy her.

The film is written by Mark Heyman and Andres Heinz and John McLaughlin, produced by Protozoa Pictures and Phoenix Pictures and presented by Fox Searchlight Pictures in association with Cross Creek Pictures.