Mila Kunis talks kissing Natalie Portman

LOS ANGELES, Feb. 6 (UPI) -- Mila Kunis thinks Natalie Portman is a lovely kisser.

The 31-year-old actress said as much of her 33-year-old Black Swan co-star in a Reddit AMA on Thursday. Kunis and Portman shared a sex scene in the Darren Aronofsky film, and the star pointed out fiancé Ashton Kutcher has also made out with the actress.

"I mean... when you have a kissing scene in a film it's not something you think about as a kissing thing," she responded to a fan question about the scene. "You have all these crew around. But she's a lovely kisser, very polite."

"But here's a little-known fact: there's one person in the world that both Ashton and I have kissed, and that's Natalie Portman," she revealed. "Maybe Zoe Saldana too? Though I can't quite recall when I played Zoe's girlfriend in a movie...but that could also be it."

Portman and Kutcher portrayed Emma Kurtzman and Adam Franklin in No Strings Attached. The romantic comedy was directed by Ivan Reitman, and follows the two characters as they attempt to have casual sex without romantic complications.

Kunis will next appear with Channing Tatum in Jupiter Ascending, which opens in theaters Friday. The film is directed by Lana and Andy Wachowski (The Matrix), and stars the actress as a janitor who discovers she is the heir to Earth.