Los Angeles: British star Kelly Osbourne has called off her engagement with model Luke Worrall.
It is said that the couple split after reports surfaced that Worrall had cheated on her, People reported online.
"Thank you all so much for your support but the matter is private and (I) will not be commenting," Osbourne wrote on micro-blogging website Twitter.
"Enough damage has already (been) done!," she added in another post.
Osbourne, 25, and Worrall, 20, got engaged in November, two years back.
Worrall has often been praised for standing by Osbourne`s bad times including her rehab stint to treat an addiction to painkillers.
He also supported her during the ninth season of reality show `Dancing with the Stars`, sitting in the ballroom with her parents, Ozzy and Sharon.