Osbourne, 61, is to become a Patron of Kerrang! Cash for Kids for the British radio station to help raise funds for children across the West Midlands, where he was born.
Kerrang! Radio's Charity Manager Kirsty Lee said: 'We're absolutely thrilled that Ozzy is supporting Cash for Kids. Ozzy is a local hero and a rock legend. To have him on board is just fantastic!'
The radio station will host a number of on-air auctions each week to raise money for the charity and donations can be made online and on the telephone in the UK.