Brian Austin Green has 'no animosity' towards ex Megan Fox and her new boyfriend Machine Gun Kelly

Brian Austin Green is showing support for his ex's new relationship.

On Saturday, a source close to the Beverly Hills, 90210 star, 47, told Us Weekly that he doesn't mind how quickly estranged wife, Megan Fox's relationship with Machine Gun Kelly, 30, is progressing.

"Brian is totally fine about them getting more serious," the insider said. "He is doing his own thing and there's no animosity."

The source also mentioned that Green has met the rapper-turned-pop punk singer and "it's not a 'thing' between them."

"He is pleased that Megan is preoccupied and happy," the insider continued. "He is socially dating and seeing different girls. He's not on that same page of being in a serious relationship right now, but he's totally cool with MGK, no question about it."

The claims come two months after Green admitted he's open to getting back together with his estranged wife.

READ MORE: Megan Fox and Machine Gun Kelly's complete relationship timeline

"I never say never," he responded to a fan's question in an Instagram Live. "I kinda feel like people are on paths in life and sometimes your paths are together and you travel that path together and you see eye to eye and then sometimes paths do different things. We had an amazing 15-year relationship. We have three beautiful kids.

The actor confirmed his split from Fox back in May, after nearly 10 years of marriage.