Megan Fox is embracing a new chapter of motherhood with open arms, and a glowing spirit to match.

The “Jennifer’s Body” star recently welcomed her fourth child, a baby girl born March 27, with ex-fiancé Machine Gun Kelly.

According to a source, the arrival has ushered in a noticeable shift in Megan Fox’s energy and mindset.

“Megan has really leaned into motherhood again,” the source told Us Weekly. “She loved when her kids were little and has missed that phase. She feels renewed and refreshed.”

In addition to her newborn daughter, Fox is also mom to Noah, 12, Bohdi, 10, and Journey, 8, whom she shares with ex-husband Brian Austin Green.

Kelly, whose real name is Colson Baker, is also father to 15-year-old daughter Casi with ex Emma Cannon.

The new addition has brought unexpected light into Fox’s life. “Friends haven’t seen her this happy in years,” the source said. “She’s glowing.”

Kelly shared the news of their daughter’s arrival on Instagram last month, writing, “She’s finally here!! Our little celestial seed. 3/27/25,” alongside a heartfelt video. The former couple had previously announced the pregnancy in November 2024, months after confirming their split earlier that same year.

Though no longer romantically together, Fox and Kelly’s relationship appears to have softened in the wake of their daughter’s birth. “The relationship is still complicated. They haven’t reconciled,” the source said. “It’s a mix of healing and hard conversations that they have had.”

Still, their bond as co-parents is stronger than ever. “It’s brought them closer together,” the insider noted, adding that both are “obsessed” with their little girl.

The new dad has also undergone a shift, according to those closest to the pair.

“The baby is already wrapped around his finger,” the source further shared. “Megan has noticed his energy is different, the look in his eyes is different, his aura has changed. She feels the baby is exactly what he needed, and she is hoping it sticks.”

Even so, Fox has some concerns. Her “biggest worry” is that Kelly “will change again and be the guy she doesn’t know.” At this point, there are reportedly no plans for the two to rekindle their romance.

Still, Kelly has shown up for his daughter, and for Fox, in every way that counts. “[He’s] making sure they are taken care of, doting on them, being present,” the source revealed. “It’s changed [Fox’s] mind a little bit about him and if there can be a future of them together.”

A few months ago, The Blast reported that Fox had reportedly decided to part ways with the musician “for good,” following what sources say was a breaking point during a Thanksgiving getaway to Vail, Colorado. Speculation about the status of their on-again, off-again romance had been swirling for months, and now it seems the rumors were grounded in real tension behind the scenes.

According to insiders, Fox discovered “upsetting material” on MGK’s phone during the trip, prompting her to call off their engagement. Since then, communication between the two has reportedly dwindled to just a few texts, and the actress is said to be focusing on her own healing.

Fox, who welcomed her fourth child, a baby girl with MGK, on March 27, has been leaning into motherhood and choosing to keep her distance. While MGK is allegedly still holding out hope for a reconciliation, sources say Fox has been firm in her decision to move forward.

The split has also drawn attention from Fox’s ex-husband, Brian Austin Green, who reportedly urged MGK to take accountability. Green called on Kelly to be honest about the situation with Fox, especially during her pregnancy.

He criticized the artist for prioritizing public perception over personal responsibility and suggested that MGK “stop worrying so much about public perception that he must involve others in his issues.”

Green, who shares three sons with Fox, previously expressed disappointment that she was preparing for a new baby in the midst of a breakup. However, he also shared his sincere hope for a healthy outcome, for Fox, the new baby, and their family as a whole.