"Kelly Osbourne and Matthew Mosshart have decided to end their engagement," says the rep in a statement. "The split is amicable and the pair continue to have nothing but the utmost respect for one another. Kelly is looking forward to a new year full of fresh beginnings. No further comments will be provided by all parties and we request privacy, decorum and space from the press but don't expect it."
The couple met in the summer of 2011 at Kate Moss's wedding before stepping out as a couple that December. They confirmed their engagement in July 2013 in a romantic Anguilla proposal.
At the time, Osbourne, 29, told Us of Mosshart, "I've never felt this close to another human being, ever. People say we're co-dependent, but we just want to be together all the time."
The Fashion Police star hasn't directly spoken out about the breakup on social media, but on Jan. 8 she tweeted, "its all about perception sometimes the bad things that happen in life aren't really bad at all especially when you learn something from it!"
The couple was last spotted out together on Dec. 12 at the amfAR Inspiration Gala in Hollywood.