The Brian Austin Green and Machine Gun Kelly saga continues.
After the Beverly Hills, 90210 star called out MGK for his behavior following his breakup with ex-fiancé Megan Fox (who the rapper is expecting a baby with), Brian received an Instagram DM from MGK.
“Stop asking when our child is gonna be born,” the musician wrote, according to a since-deleted screenshot posted to Brian’s Instagram Story. “You the FEDS. Quit calling TMZ and focus on that apology you owe me for speaking my name in public.”
Per the screenshot, which has since been reshared online, the 34-year-old then warned Brian that he “chose the wrong one to f--k with” and that he should “go back” to making cereal commercials.
However, Brian—who married Megan in 2010 and split for the final time in 2020, the same year she moved on with MGK—laughed off the response in his Instagram Stories.
“I didn’t know ‘child actor’ was something bad,” the 51-year-old wrote with several laughing emojis, before referencing Leonardo DiCaprio. “Leo, careful. He may be coming for you next.”
Brian previously addressed MGK’s behavior back in December, shortly after the singer’s breakup with the Jennifer's Body star. “He’s in his 30s, isn’t he?” Brian asked TMZ. “In your 30s, f--k. Grow up. Like, she’s pregnant.”
He then called out MGK, whose real name is Colson Baker, again in early February, writing on Instagram Stories, “Just be honest for once in your life.”
Days later, Brian confirmed that he would no longer speak on Megan, 38, and MGK’s disparaging split.
“That’s not something that I normally do, but it just really at the time, really got under my skin to read about his sort of take on it,” Brian—who shares kids Noah, 12, Bodhi, 10, and Journey, 8, with his ex-wife—told People of his decision at the time. “So I spoke my mind, but then I've since come to terms with the fact that I won't do that anymore.”
He then concluded that moving forward, he’s “going to shut up and just sit back.”
E! News has reached out to reps for Brian, MGK and Megan for comment and has not heard back.
Keep reading to revisit Megan and MGK’s relationship history…
July 2020: How They Met
The 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..."
August 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."
November 2020: Red Carpet Official
The 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.
April 2021: Double Birthday Date
Double date! The duo celebrates MGK's birthday with friends Kourtney Kardashian and boyfriend Travis Barker.
May 2021: iHeartRadio Music Awards
Pretty in pink! Megan supports Machine Gun Kelly as they attend the iHeartRadio Music Awards in Los Angeles.
May 2021: Billboard Music Awards
The lovebirds arrive at the 2021 Billboard Music Awards in Los Angeles.
May 2021: Onstage Love
The two appear onstage during the rocker's show at the Barstool Sports Indy 500 party at Grand Park in Westfield, Indiana.
January 2022: We're Engaged
New 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.
October 2022: Pam & Tommy
The two dressed up as Pamela Anderson and ex-husband Tommy Lee at the annual Casamigos Halloween party.
February 2023: Grammys Date Night
The two embraced on the red carpet on music's biggest night.
May 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.
October 2023: Happy Halloween
The two also partied at Vas Morgan and Michael Braun's Halloween party.
October 2023: Kill Bill Couple
The two appeared at the annual Casamigos Halloween party.
March 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."
November 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."
November-December 2024: Breakup
In late November, shortly after confirming Megan's pregnancy, the duo called it quits, multiple outlets reported Dec. 10.
March 2025: It's a Girl!
The duo welcomed a daughter on March 27, 2025. According to MGK, Megan gave birth while listening to a score composed by himself and pal Travis Barker.
"What an epic journey," he wrote on his Instagram Story. "Praise God."