Mila Kunis Reveals Only Person Both She and Ashton Have Kissed

— -- Pop quiz: Who is the only person both Mila Kunis and Ashton Kutcher have kissed?

Hint: It happened for movies.

During a Reddit Ask Me Anything session, the "Jupiter Ascending" star, 31, opened up about kissing "Black Swan" co-star and Oscar winner Natalie Portman.

Read: Mila Kunis Gushes Over Her Post-Baby Body

"How was it making out with Natalie? I mean... when you have a kissing scene in a film, it's not something you think about as a kissing thing," the new mother said. "You have all these crew around. But she's a lovely kisser, very polite."

She continued, "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."

Kutcher, 37, famously kissed Portman for the film "No Strings Attached," where the two play love interests.

There you have it. If not already, Portman is the envy of every man and woman in the world.