Megan Fox and Machine Gun Kelly are "very excited" to welcome their first baby together, a source exclusively tells PEOPLE. "They can't stop talking about the baby," the insider says.

Parenthood isn’t a new role for either star. MGK, for his part, is father to 15-year-old daughter Casie, whom he shares with ex Emma Cannon. Meanwhile, Fox shares sons Noah, 11, Bodhi, 9, and Journey, 7, with ex-husband Brian Austin Green. (Green, for his part, has moved on with fiancée Sharna Burgess, with whom he shares 2-year-old son Zane.)

Megan Fox and Machine Gun Kelly are expecting a baby together, happy news Megan announced with a photo of herself covered in what looks to be black oil (a very on-brand announcement). And while the couple have had some ups and downs in their four-year relationship, Megan’s pregnancy has brought them closer together.

Megan Fox is pregnant with her and Machine Gun Kelly's baby. And while the couple remained mostly tight-lipped about the news, there have been some hints along the way.

Machine Gun Kelly joins The Voice as Gwen Stefani's Playoff Advisor, to help give contestants during the high-stakes Playoffs stage of the show.