Sharon Osbourne has three children

Sharon Osbourne wept on US TV yesterday as she discussed how her son Jack, 26, was diagnosed with multiple sclerosis just 3 weeks after his fiancée Lisa Stelly gave birth to their daughter Pearl.

Sharon, 59, was speaking with her co-hosts on daytime chat show The Talk when she broke down in tears in front of viewers.

'I want to thank everyone for their texts and goodwill and love they send to us,' said Sharon.

'It's been amazing... for Jack because I really believe the vibes of prayer help.

'And what I'm doing right now is not helping because I'm just feeling sorry for myself, and that is no good.'

Other members of the Osbourne family have also been rallying around Jack since he found out he's suffering from the autoimmune disease, which is incurable and attacks the brain and central nervous system.

Sister Kelly, 27, told her Twitter followers how impressed she is with the way he's handling the diagnosis.

'please support my brother @mrjacko in not only his bravery but honesty! i love you so much jack & I'm so proud of you!' she Tweets.

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Anna Duff