The singer is making it clear that Jenner needs to leave Hemsworth's name out of his mouth by lashing out at "The Hills" star on social media after he poked fun at Cyrus for making out with Carter.
It all went down on Sunday afternoon, when Brody shared an Instagram post on social media and wrote, "Don't let yesterday take up too much of today."
Fans thought it was a direct response to the photos circulating showing Miley kissing his ex, just hours after the singer announced her split from Hemsworth.
Jenner's "Hills" co-star Brandon Lee tried to make light of the situation and commented back, "Let's round this scandal out and post a pic os us making out."
That's when the reality star brought Miley's ex into the conversation.
Responding back to Brandon, he wrote, "Watch out! Pics of Liam and I holding hands on the beach coming soon."
Miley didn't think that was funny, and even though she's overseas with Carter, she let it be known.
"Go take a nap in your truck and cool off," she responded while tagging Jenner.
She also included, "#HotGirlSummer."
Interestingly enough, Jenner recently commented on his ex's Instagram post where she's seen smiling alongside Miley.
As The Blast reported, Brody Jenner and Kaitlynn Carter announced their split last week after only one year of marriage.
They said "I do" in front of friends and family in Bali last year, but never filed the appropriate paperwork to make their marriage legal in the U.S., which has left them open for punches.
Miley Cyrus and Liam Hemsworth announced their breakup yesterday after less than a year of marriage.
Saying they were taking time apart to focus on themselves, a rep said, "Ever-evolving, changing as partners and individuals, they have decided this is what’s best while they both focus on themselves and careers."
The statement continued, "They still remain dedicated parents to all of their animals they share while lovingly taking this time apart. Please respect their process and privacy."
While Hemsworth has remained silent about the split, Miley spoke out this AM with a few cryptic posts.
"Life’s a climb... but the view is great," was one of the captions she used. "New day. New adventure," was another.