Megan Fox’s Ex Brian Austin Green Reacts to Machine Gun Kelly Split

Brian Austin Green is firmly in his ex-wife Megan Fox’s corner.

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.”