British singer/reality TV personality Kelly Osbourne and model Luke Worrall have broken off their engagement, People.com said.

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The couple announced their engagement in November 2008.

People.com said they called off their wedding plans amid reports Worrall cheated on Osbourne, a former "Dancing with the Stars" contestant who is the daughter of rock icon Ozzy Osbourne and TV personality Sharon Osbourne.

"Thank you all so much for your support but the matter is private and (I) will not be commenting," Kelly Osbourne said via Twitter Wednesday. "Enough damage has already (been) done!"