The stars have had an on-again, off-again romance since meeting on set in early 2020.

Megan Fox and Machine Gun Kelly have split less than a month after announcing they’re expecting their first child together, according to reports.

TMZ was first to report on Dec. 10 that the pair broke up over Thanksgiving weekend while they were in Vail, Colo. Us Weekly confirmed the news the same day through a source close to the couple.

“They were trying to make it work again after the pregnancy, but they are both too hot-headed and fell back into their constant fighting,” an insider told Us Weekly. However, while the two are “done for now,” they “could very well [get] back together.”

The split comes on the heels of their pregnancy announcement on Instagram Nov. 11, almost a year after the couple revealed that they had experienced a pregnancy loss.

The baby, reportedly due in March or April, will be the 38-year-old Transformers actress’s fourth child. She has three — Noah, 12; Bodhi, 10; and Journey, 8 — with her ex-husband, Brian Austin Green. Kelly, 34, is dad to a daughter, Casie, 15.

Fox and Kelly connected while filming 2021’s Midnight in the Switchgrass. The two revealed their relationship was “intense” right away and that passion has been a common theme throughout their four years together. They got engaged in 2022, split the following year, but ultimately reconnected.

May 2020: World learns of Fox and MGK’s romance

Fox and Kelly sparked dating rumors when they stepped out together amid the pandemic in L.A. It was quickly confirmed that Fox and Green had secretly ended their 10-year marriage and that she and Kelly were now an item.

July 2020: Couple speaks out for 1st time

After Fox learned Kelly had been cast opposite her in Randall Emmett’s thriller, she “could feel that some wild shit was going to happen to me from that meeting, but I wasn’t yet sure what.”

In a joint interview, Kelly said he’d stand outside his trailer hoping “to catch one glimpse of eye contact” with Fox. “She would have to get out of her car. There were like, five steps between the car and the trailer. And I would just sit there and hope.”

Fox deemed Kelly her “twin flame,” which she said means more than the term “soulmate.”

“The second I was in a room with him and said hello to him and looked into his eyes, I knew right away that he was what I call a twin flame,” she said. “Instead of a soulmate, a twin flame is actually where a soul has ascended into a high enough level that it can be split into two different bodies at the same time. So we’re actually two halves of the same soul, I think. And I said that to him almost immediately, because I felt it right away.”

Megan Fox and Machine Gun Kelly attend the 2020 American Music Awards. (Emma McIntyre/Getty Images for dcp)

November 2020: Red carpet debut

Kelly and Fox walked the carpet for the first time at the 2020 American Music Awards. Fox introduced his performance of “Bloody Valentine” — a music video of his song that she starred in — and “My Ex’s Best Friend.”

October 2021: Couple shares more insights into relationship

In a joint interview for British GQ Style, the couple revealed they met years before the film at a party in Los Angeles, but never saw each other’s faces.

“I don’t remember your face. … And I definitely would have remembered his face,” Fox said. “I just remember this tall, blond, ghostly creature, and I looked up and I was like, ‘You smell like weed.’ He looked down at me and he was like, ‘I am weed.’ Then, I swear to God, he disappeared like a ninja in a smoke bomb.”

Fox said she believes they “weren’t allowed to see each other yet.”

“We weren’t supposed to run into each other that night, so our souls, our spirit guides, were luring us away from each other, because you literally had no face, like that thing from Spirited Away. It is hard to see his face in general, but really he had no face that night,” Fox recalled before turning to Kelly: “Thank God, [because] what torture had I known you were there and I couldn’t get to you. It was better that I didn’t know.”

Fox also talked about their “very intense relationship.”

“Our souls chose this to absolutely have to face our shadow selves; to face things about ourselves we didn’t want to have to know, that we tried to push away,” she said.

Kelly added they will “go to hell with each other” and described their relationship as “ecstasy and agony.”

“I don’t want people to think anything’s perfect with us. I didn’t say it was the darkest fairy tale for no reason. God help you if you would’ve met us last Saturday,” he concluded.

January 2022: Fox and Kelly announce engagement — with a bloody twist

The musician proposed to Fox at a sentimental spot in Puerto Rico.

“We were oblivious to the pain we would face together in such a short, frenetic period of time. Unaware of the work and sacrifices the relationship would require from us but intoxicated off of the love. And the karma. Somehow a year and a half later, having walked through hell together, and having laughed more than I ever imagined possible, he asked me to marry him,” she wrote on Instagram. “And just as in every lifetime before this one, and as in every lifetime that will follow it, I said yes. …and then we drank each other’s blood.”

February 2023: Engagement is off

After a “big fight” over Super Bowl weekend, Fox deleted photos of her fiancé from Instagram. The actress then deleted her profile altogether, after posting a lyric from a Beyoncé song about infidelity. Sources told Yahoo Entertainment that the two hit a major rough patch.

“They’ve had plenty of ups and downs throughout their relationship, but this one seems serious,” one insider explained.

A second source close to the singer echoed something similar: “It’s certainly not the first big fight they’ve had. They can usually work through it.”

Multiple outlets reported the two had ended their engagement.

May 2023: MGK and Fox get back together

A few months later, people reported they were working on their relationship.

“They are back together. They have explored therapy,” a source claimed. “Things are still not back to normal, though.”

November 2023: Fox shares private trauma

The actress appeared on Good Morning America, where she opened up about suffering a “difficult” miscarriage.

“I’ve never been through anything like that before in my life,” she said while promoting her poetry book Pretty Boys Are Poisonous. “I have three kids, so it was very difficult for both of us.”

Fox continued, “It sent us on a very wild journey together and separately, and together and apart, and together and apart, and together and apart. Trying to navigate, ‘What does this mean?’ and ‘Why did this happen?'”

March 2024: Fox comments on status of MGK relationship

For the first time, Fox confirmed that she and Kelly had called off their engagement in 2023 and then got back together. However, she told Alex Cooper on the Call Her Daddy podcast that after being too open with their romance, she and the musician now planned to be more guarded.

“I think that what I’ve learned from being in this relationship is that it’s not for public consumption,” Fox told Cooper. “So I think, as of now, I don’t have a comment on the status of the relationship, per se. What I can say is that [he] is what I refer to as being my ‘twin soul,’ and there will always be a tether to him, no matter what.”

Fox said she “can’t say for sure what the capacity will be, but I will always be connected to him somehow.”

“Beyond that, I’m not willing to explain,” she added. ” All those things you said were accurate things that have occurred. And I could see them being confusing or interesting to people, and them being like, ‘What’s up?’”

November 2024: Fox announces pregnancy

In an Instagram post, the 38-year-old actress revealed she was pregnant. “Nothing is ever really lost. welcome back,” she wrote with angel and heart emojis. Fox tagged Kelly. The caption references lyrics from Kelly’s song “Last November,” which is about the loss of the pregnancy.

December 2024: They split — again

Less than a month after they announced their pregnancy news, TMZ reported that the pair split over Thanksgiving. According to the outlet, Fox saw something on Kelly’s phone that upset her. (In February 2023, they reportedly had a similar situation, splitting over DMs and texts on Kelly’s phone, according to Page Six.) Us Weekly confirmed that Fox and Kelly parted ways. A source told the outlet that the “hot-headed” pair fought a lot and had a hard time getting “on the same page.” The insider added, “It’s not easy for them being together.”

But is it for now or forever? We’ll all have to stay tuned.

— Suzy Byrne contributed to this report