Kelly Osbourne fought back tears as she told an audience that a member of her family was HIV positive.

The TV personality, who is hosting the current series of Sky One’s Project Catwalk, was speaking at a benefit gig for HIV support charity Body & Soul at Koko in Camden, north London.

Introducing a performance by the Scissor Sisters, she said the cause was special to her because a member of her family had been diagnosed with HIV.

And the young star then started sobbing before leaving the stage, according to photographers present at last night’s concert.

Kelly shot to fame on the reality TV show The Osbournes, which followed the antics of her father, rock star Ozzy Osbourne, and his dysfunctional family, including mum Sharon and brother Jack.

She’s since gone on to carve out a TV presenting career, after a short-lived attempt to conquer the charts.

Her representatives could not be contacted for comment.