A personal soundtrack for an epic moment

As if the announcement wasn’t sentimental enough, Kelly revealed that the music in the Instagram video was an original composition.

“We composed the score of the birth,” he shared, adding that the song was created at the healing frequency of 432 Hz, which is often associated with relaxation and harmony.

"Born into 432 Hz," he wrote, tagging collaborators like Travis Barker and No Love for the Middle Child, among others.

The video, which captured the raw beauty of parenthood, was a hit with fans and celebrities alike, with many sharing their congratulations in the comments section.

This is Fox’s fourth child, as the actress is already mom to three sons Noah, 12, Bodhi, 11, and Journey, 8, whom she shares with ex-husband Brian Austin Green.

Her new daughter with Kelly marks an exciting addition to her growing family.

Fox announced her pregnancy back in November 2024, sharing a poignant post that hinted at the deep emotion surrounding the moment.

“Nothing is ever really lost. Welcome back 👼🏼❤️,” she wrote alongside a photo cradling her baby bump.

The journey to this point hasn’t been without its challenges. In late 2023, the actress opened up about a devastating pregnancy loss that she and Kelly experienced, calling it one of the most difficult times of her life.

“I had never been through anything like that before,” she shared in an interview with Good Morning America.

“It sent us on a very wild journey together and apart," she revealed.

A complicated love story

Fox and Kelly’s relationship has been anything but conventional, and fans have been captivated by their rollercoaster romance since it began.

The pair got engaged in January 2022 under the same banyan tree where they had fallen in love.

However, by late 2023, they had called off their engagement, and rumours swirled about their on-again, off-again dynamic.

Despite their ups and downs, Fox has always spoken highly of Kelly, calling him her “twin soul.”

In a March 2024 interview, she shared, “I will always be connected to him somehow... There will always be a tether to him, no matter what.”

While the details of Fox and Kelly’s current relationship remain unclear, one thing is certain: both are over the moon about their new arrival.

Sources close to Fox have shared that she’s focusing on her children and embracing this new chapter as a mom of four.

“She’s very excited about the baby,” an insider told PEOPLE, adding that Fox is “doing okay” and prioritising her kids.