Ashton Kutcher and Mila Kunis Expecting First Child

Ashton Kutcher and Mila Kunis are engaged — and expecting!

The Two and a Half Men star and his actress fiancée will welcome their first child later this year, a source confirms to PEOPLE.

“They are both very, very happy. It’s still early,” a friend of the couple says.

Responding to rumors last week that the couple was expecting twins, the source says, “No, not twins.”

Now Kutcher, 36 and Kunis, 30, who were spotted locking lips at a Clippers game in LA on Saturday, have a baby and a wedding to plan for, and while they have not revealed a wedding date, a source says they’re not in any hurry to tie the knot.

“It won’t necessarily be a short engagement,” a friend close to the couple told PEOPLE. “They haven’t begun planning the wedding yet.”

The pair began dating in 2012, but their friendship started after meeting on the set of That ’70s Show in 1998. However, a source says that Kutcher had feelings for his costar from the beginning.

“He was so in love with [Mila] for a while when they worked together,” a source close to Kutcher told PEOPLE in 2012, when rumors began to swirl that the two were dating. “He thought she was a goddess, was always talking about how beautiful she is.”