Things got pretty steamy between Natalie Portman and Mila Kunis on the set of their new film "Black Swan" -- and they talked all about it with "Extra's" Terri Seymour.

The film, a psychodrama about rival ballerinas whose relationship takes a curious turn, is already creating lots of buzz for its performances -- and for their relationship in the film.

Photos: Natalie Portman Through the Years!

"It was awkward," Portman said of having to make out with Kunis. "You know, we've been good friends for a really long time, but that's just awkward."

Both women trained extremely hard to transform their bodies into prima ballerinas, and they have the battle wounds to prove it. "I dislocated my shoulder," Mila told Terri. "I tore a ligament and I have two scars on my back... they're Benjamin Millepied's [her co-star] thumbprints on my back from being lifted."

Check out Natalie and Mila when "Black Swan" dances into theaters this Friday.

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