Chris Zylka and Hanna Beth's breakup just got messy.

The 29-year-old "Amazing Spider-Man" actor ended his 10-month engagement to his model fiancée, Us Weekly reported. Zylka took to his Instagram account on Wednesday, where he announced his split.

"I'm disappointed that I didn't see how fake you were, or pay attention to the backstabbing you did in front of me. I will rise up," the actor wrote, alongside a photo of a quote that read, "You are only going to be as good as the people you surround yourself with so be brave enough to let go of those who keep weighing you down."

On Twitter, Zylka revealed that Beth allegedly cheated on him with a mystery "guy from boy London" who brought her "pink flowers."

"When someone's boyfriend shows up at their house with flowers while you're in that someone's bed. Don't get involved with them," he told his followers. "@TheHannaBeth the truth has been revealed for a long time. Google yourself. @TheHannaBeth have fun 'staying sober' groupie."

Zylka added, "@chriszylka @TheHannaBeth no it was in the bed and the guy from boy London was with the flowers. Pink flowers to be exact."

Beth tried to avoid her former lover's comments.

"There is always tomorrow..When people try to put you down or call you names..Ignore it. The only person they're actually talking about is themselves. Hate gets you nowhere. Always rise above. When people don't get their way, they want to bring you down. Don't let them. No reaction is better than any reaction. Making up lies about someone cause you are hurt will never work or make you feel better," she tweeted.

Zylka and Beth began dating in December 2013 before getting engaged in April 2014. Beth shared the news via Twitter at the time, writing, "I'm engaged!!!!!" 

Before ending the online rant about his ex-fiancée, Zylka assured fans, "All the things I've said tonight are things that I looked over and gave my everything to."

Both Zylka and Beth have reportedly deleted all tweets concerning their relationship.