and daughter Kelly will relive the family's screwball lives on to raise £4.5million for 's homelessness charity Centrepoint.
They will celebrate The Osbournes show in a promotion for Omaze which is giving away a £5million mansion in a prize draw.
Kelly, 41, revealed: 'I said I'd only do this if the charity side was really meaningful. I wanted Omaze to match the value of the house and they pretty much have.
'I think William will make an amazing King and I really hope he's pleased with the donation. That amount will completely change the face of the charity.'
It will be the biggest donation received by Centrepoint, whose shelters for the in were first shown to William as a child by his mother Diana. The advert will air this week, featuring Sharon, 73, and Kelly flicking through photo albums from their chaotic lives with Ozzy and Kelly's brother Jack.
They tour the Georgian-style Omaze house and scenes at their own Georgian-style £15million home in Jordans, Buckinghamshire. Black Sabbath frontman Ozzy, 76, is buried in the garden there after his death last summer.
Kelly weeps in the footage when she . He broke several ribs and his collarbone and had a spinal injury that plagued him for years.
The Osbournes bought the mansion in 1993 but later moved to Los Angeles.
Sharon Osbourne (left) and daughter Kelly (right) will relive the family's antics from their hit reality TV show as part of a new charity initiative
(L-R) Kelly, Ozzy, Sharon and Jack pose for a photo as part of their reality show The Osbournes, which aired from March 2002 to March 2005
Prince William is pictured during a visit to homelessness charity Centrepoint, for which he is the royal patron
Sharon has now returned to the Buckinghamshire home and Kelly has sold her £3million house in LA to live in nearby Beaconsfield.
Kelly told The Mail on Sunday: 'I hope to meet William at a gala in September and I have so many ideas I'd like to tell him about. He has such clarity and goes to the grassroots of the centres to help and support them.
'I won't rest until we end homelessness, which is a pledge the future King holds.'
Sources close to the charity say William has been struck by the scale of the fundraising effort driven by Kelly. Now royal patron of Centrepoint, like his late mother, he has made tackling homelessness one of the defining causes in his public work.
King Charles met Ozzy several times and wrote to Sharon .
Kelly, who has drawn concern over her recent weight loss, described Charles as 'so kind' for writing and said Sharon kept the letter on her bedside table.
She said she was finding charity work 'really fulfilling' in the aftermath of her father's death.
The Omaze house is in a mystery countryside location, to be , and features open-plan living spaces, landscaped gardens and sweeping rural views.
Sharon and Ozzy meet then Prince Charles during 30th anniversary celebrations for The Prince's Trust in May 2006
Kelly and Sharon Osbourne attend The BRIT Awards in Manchester on February 28, 2026
The mother-daughter duo aim to raise £4.5million through the charity event
One entrant will win it and its furnishings outright, while the proceeds from ticket sales will go towards Centrepoint's work with homeless young people.
Omaze has raised more than £100million for charities since 2020, guaranteeing a minimum £1million per house draw.
Previous celebrities featuring in the Omaze prize draw have included Benedict Cumberbatch and Olivia Colman.
Founded in 1969, Centrepoint supports thousands of vulnerable young people every year. Its CEO Seyi Obakin said: 'Kelly and Sharon's generosity, together with their commitment to ending youth homelessness, has made possible a truly inspiring campaign.'
