AshtonKutcherMilaKunis_032314.jpgSpread Pictures

So the rumors are true, after all -- Mila Kunis is pregnant!

Mila and her fiance Ashton Kutcher are expecting their first child together, E! Online reports.

The couple got engaged about a month ago. She was first photographed with a huge diamond on her ring finger in late February while shopping with her mom at Los Angeles' Grove retail center.

The former That '70s Show costars remained friends after the sitcom came to an end in 2006. It's unclear exactly when they started dating, but the private couple went public with their relationship in 2011. Ashton finalized his divorce from Demi Moore last November.

Mila was reportedly recently spotted attending a prenatal yoga class in Hollywood.