Kelly Osbourne splits from fiancé amid infidelity claims

It's the end of the road for Kelly Osbourne and model Luke Worrall – who have broken up two years after they got engaged.

The couple ended their relationship amidst reports Kelly's fiancé had been unfaithful.

On Twitter, the reality TV star replaced a profile picture of her and Luke with one of her alone.

She also tweeted thanking fans for their support, but said "the matter is private and [I] will not be commenting enough damage has already be done".

Though earlier she'd rebuked a blogger who suggested that if her 20-year-old boyfriend had strayed it was because of Kelly's looks.

"Thanx your a real sweet heart so what your saying is that im ugly so it was ok for him to cheat," wrote Kelly.

And the 25-year-old used Facebook to post: "Luke Worrall makes me sick" - though she later deleted her entry. 

The pair announced their engagement in March 2009, almost a year after they started dating.

Kelly's parents urged them to wait before they got married.