Kelly Osbourne has laughed off rumors she is engaged, insisting she is too young to walk down the aisle.

The 23-year-old sparked rumors she is to wed model boyfriend Luke Worrell after she was photographed this week sporting a ring on her ring finger.

But Osbourne claims the band is not an engagement ring - and that she "always" wears jewellery on her wedding finger.

She tells Wenn, "I always wear rings on this finger. Luke's 18 and I'm 23 - we're not getting married."