By Davan 
While the Beverly Hills 90210 alum had “no idea” about the pregnant Transformers star’s split from fiancé Machine Gun Kelly, he had a strongly-worded message for the dad-to-be.
“He’s in his 30s, isn’t he?” Brian said of MGK, 34, in a Dec. 12 interview with TMZ. “In your 30s, f–k. Grow up. Like, she’s pregnant.”
Despite his passionate reaction, Brian—who shares kids Noah, 12, Bodhi, 10, and Journey, 8, with Megan as well as 2-year-old son Zane with dancer Sharna Burgess—expressed empathy for his ex.
“I just want the best for her,” the 51-year-old shared. “I’m heartbroken about it, because I know she’s been so excited and the kids are so excited for life and the change and all of that.”
The Anger Management star also had an optimistic outlook for his blended family.
“I hope that the best outcome that could possibly happen, happens,” he continued. “For her, for the baby and for our kids.”
Kevin Mazur/Getty Images for The Recording Academy“I’ve never been through anything like that in my life,” she told Good Morning America at the time. “I have three kids, so it was very difficult for both of us and it sent us on a very wild journey together and separately…trying to navigate, ‘What does this mean?’ and ‘Why did this happen?”
While the couple went on to announce the impending arrival of their first child together Nov. 11, multiple outlets reported the two parted ways just one month later.
And although neither star has commented on the alleged split, Megan’s Subservience costar Michele Morrone quickly shut down rumors that he’d taken up a romance with her.
“Any accusations beyond a work friendship are simply untrue,” Michele’s rep told E! News Dec. 10. “They filmed a movie together a year ago. Michele is currently in Italy filming another project.”
For a closer look at Megan and MGK’s relationship, keep reading.
InstagramThe couple did their first podcast together and detailed how they met on the set of the movie Midnight in the Switchglass. They also became Instagram official in July when MGK posted a selfie of the couple with the caption, “Waited for eternity to find you again…”
InstagramAugust 2020: Megan Professes Her Love
The actress shared the first photo of herself with her new man captioning it, “Achingly Beautiful Boy… My heart is yours.”
ABC / Contributor / GETTY IMAGESThe couple made their first red carpet appearance at the American Music Awards. The same month, the actress files for divorce from estranged husband Brian Austin Green, with whom she shares three sons.
InstagramDouble date! The duo celebrates MGK’s birthday with friends Kourtney Kardashian and boyfriend Travis Barker.
Emma McIntyre / Staff / GETTY IMAGESPretty in pink! Megan supports Machine Gun Kelly as they attend the iHeartRadio Music Awards in Los Angeles.
Todd Williamson/NBC / Contributor / GETTY IMAGESThe lovebirds arrive at the 2021 Billboard Music Awards in Los Angeles.
Michael Hickey / Contributor / GETTY IMAGESThe two appear onstage during the rocker’s show at the Barstool Sports Indy 500 party at Grand Park in Westfield, Indiana.
JASON SZENES/EPA-EFE/ShutterstockNew year, new relationship status! On Jan. 12, 2022, Megan Fox and Machine Gun Kelly announced on Instagram that they were engaged. “Yes, in this life and every life,” the musician wrote on Instagram.
Kevin Mazur/Getty Images for CasamigosOctober 2022: Pam & Tommy
The two dressed up as Pamela Anderson and ex-husband Tommy Lee at the annual Casamigos Halloween party.
Kevin Mazur/Getty Images for The Recording AcademyFebruary 2023: Grammys Date Night
The two embraced on the red carpet on music’s biggest night.
Ricky Vigil M / Justin E Palmer/GC ImagesMay 2023: London Date Night
Megan supported MGK at the unveiling of The 8th Deadly Sin – GOSSIP, a limited-edition ring collection collab by the musician and Stephen Webster in London.
Rachpoot/Bauer-Griffin/GC ImagesOctober 2023: Happy Halloween
The two also partied at Vas Morgan and Michael Braun‘s Halloween party.
Michael Kovac/Getty Images for CasamigosOctober 2023: Kill Bill Couple
The two appeared at the annual Casamigos Halloween party.
Gilbert Flores/WWD via Getty ImagesMarch 2024: Megan Gives Relationship Update
The actress confirmed that she and MGK had at one point called off their engagement.
“What I’ve learned from being in this relationship is that it’s not for public consumption,” she said on the Call Her Daddy podcast. “So I think as of now, I don’t have a comment on like the status of the relationship.”
She continued, “What I can say is, that is what I refer to as being my ‘twin soul’, and there will always be a tether to him no matter what.”
Ricky Vigil M / Justin E Palmer/GC ImagesNovember 2024: Baby on Board
The couple shared that they were expecting a baby together with Megan writing on Instagram, “Nothing is ever really lost. Welcome back,” alongside a photo posing naked covered in black paint and holding her baby bump.
She also included a picture of a pregnancy test with the word, “Yes.”
Kevin Mazur/Getty Images for The Recording AcademyNovember-December 2024: Breakup
In late November, shortly after confirming Megan’s pregnancy, the duo called it quits, multiple outlets reported Dec. 10.