Laura Prepon isn't surprised at all by Ashton Kutcher and Mila Kunis' relationship! The 33-year-old actress revealed to Us Weekly that her former That '70s Show costars, dating for over a year, are the real deal.

"It's incredible!" she told Us at the Variety Pre-Emmy Party in Beverly Hills, Calif., on Friday, Sept. 20. "I wasn't surprised either," she said of the couple's budding romance.

"They're like my family," she said. The friends are so close that the Orange is the New Black actress also revealed that Kutcher, 35, was indeed Kunis' first kiss. "He was. He was," she confirmed. Kutcher and Kunis' characters, Michael Kelso and Jackie Burkhart, dated on the show.