The Vampire Diaries star and her fiancé Cottrell Guidry have called it quits, according to E! News, which reported that the longtime couple ended their two-year engagement.
"It's happened a while ago," a source told the site. "There wasn't any drama and they are still friends."
Cottrell first announced their engagement back in October 2012 on Facebook, before quickly deleting the post.
Although they had been together for some time before that, Kat sparked rumors that they had broken up when she showed up without her engagement ring and stayed mum about wedding updates on the red carpet of the Diamond Ball Thursday night.
Rather than giving hints about her wedding, the 25-year-old actress said instead that she was focused on having a good time with her pal Nikki Reed at the gala.
In spite of the break-up, Kat appeared to be in good spirits at the event, looking stunning in a burgundy gown.