AceShowbiz - Brian Austin Green revealed that he is "heartbroken" upon learning of Megan Fox and Machine Gun Kelly's split. The former "Beverly Hills, 90210" star told the "Concert for Aliens" artist to "grow up" after the breakup.

On Thursday, December 12, the 51-year-old actor was approached by a TMZ reporter when he was out and about in Calabasas. He was shocked after being told that Megan and MGK, who announced that they are expecting their first child together in early November, had split. He admitted, "I didn't even know. I had no idea."

Brian sighed after the paparazzo told him that Megan allegedly "found something inappropriate" in MGK's phone. He also said that he has "no idea" if the musician "cheats on her a lot." He went on to state, "But in your thirties... I don't know, grow up. Like, you know, she's pregnant."

When he was asked if he's worried about Megan, Brian responded, "I just want the best for her. I want the best for the baby. I want the best for our kids," making a reference to his three children with Megan. He added, "Well, that's a shame. That's a shame. I'm heartbroken about it."

On the reason why, the former "Anger Management" star, who ended his marriage to Megan in 2021, explained, "I know she has been so excited and the kids are so excited for life and the change and all of that." He continued, "Nothing about it makes me feel any better."

"I don't know the facts of it but if that's the case, that's a tragic situation. And I wouldn't wish that on anybody," Brian added, before concluding, "I hope that the best outcome that could possibly happen happens for her, for the baby and for our kids."

Brian's response came a few days after Megan allegedly dumped MGK when they were on a trip to Vail, Colorado during Thanksgiving weekend. The two split after she reportedly found "upsetting material" on his phone. The breakup was revealed to be "final" as she allegedly was "done with his behavior."