The actress is already mom to three kids with ex Brian Austin Green

egan Fox and Machine Gun Kelly attend the 2021 iHeartRadio Music Awards at The Dolby Theatre in Los Angeles, California, which was broadcast live on FOX on May 27, 2021; Megan Fox and Machine Gun Kelly welcome baby girl

Megan Fox and Machine Gun Kelly and their newborn daughter. Photo: Phillip Faraone/Getty; Machine Gun Kelly/Instagram

Megan Fox’s family has grown by one more.

The Jennifer’s Body alum, 38, welcomed her fourth baby, a girl, her first with ex Machine Gun Kelly, on Thursday, March 27. The singer, 34, shared the exciting news on his Instagram as he posted a video of himself with his newborn daughter.

“She’s finally here!! our little celestial seed 🥹💓♈️♓️♊️,” Kelly wrote in the caption. “3/27/25.”

In the black-and-white video, Kelly can be seen holding his baby daughter’s hand, stroking her fingers.

Fox and Kelly, who got engaged in January 2022, called it quits at the end of November, not long after announcing their baby on the way. The actress is already mom to sons Noah, 12, Bodhi, 11, and Journey, 8, whom she shares with ex-husband Brian Austin Green.

After Fox ended things with Kelly, a source told PEOPLE that she wasn’t really speaking to the rapper amid the end of their relationship. “They tried to make things work for many years. It was exhausting for Megan,” a source told PEOPLE.

“She’s done with him now. She just wants to focus on the baby and her boys now. She lives alone and doesn’t have much contact with MGK,” they continued. “She’s doing okay. She’s very excited about the baby.”

Machine Gun Kelly and Megan Fox attend the 2022 Billboard Music Awards on May 15, 2022 in Las Vegas, Nevada.

Machine Gun Kelly and Megan Fox attend the 2022 Billboard Music Awards on May 15, 2022 in Las Vegas, Nevada.Matt Winkelmeyer/Getty

This past December, a source told PEOPLE that the actress was feeling grateful for the co-parenting support she receives from Green and fiancée Sharna Burgess as she navigates her split from her ex-fiancé.

“She’s been so happy about being pregnant,” the source shared. “She’s in a good place with both Brian and Sharna. She gets along really well with Sharna. Megan trusts her around the boys.”

Fox first announced that she is expecting her first baby with Kelly, born Colson Baker, in November. “Nothing is ever really lost. welcome back 👼🏼❤️,” she captioned the post, using song lyrics from Kelly’s track “last november,” a song about his and Fox’s past pregnancy loss.