Sources confirm the couple are expecting a girl, and may have a name picked out for their daughter.
"Mila's having a girl," an insider tells Radar Online. "And the baby's nursery is put together! It's decorated green with baby animals. It's jungle-themed."
"A name being talked about and floating around is Finn," the person adds. "Ashton's mom's maiden name is Finnegan."
Kunis and Kutcher met on the set of sitcom That 70s Show, but didn't begin dating until April 2012. The pair confirmed their relationship in March 2013, and became engaged in February this year. Pregnancy rumors began the next month, and Kunis confirmed her pregnancy in May. The baby is the couple's first child together.
Kunis will next appear alongside Channing Tatum in Jupiter Ascending in 2015.