"It's going to be very different for us because Ozzy's not going to be prancing about onstage - he's going to be on a throne because he has problems with walking due to his Parkinson's disease - but he tells me his voice is in good shape.
The proceeds from the gig will be split equally across three charities -Birmingham Children's Hospital, Acorn Children's Hospice and Cure Parkinson's - a cause that is close to Ozzy's heart as he has lived with Parkinson's since 2020.
Black Sabbath guitarist Tony Iommi revealed Ozzy would be sitting on a throne for the gig at Villa Park.
Ozzy, who is nicknamed the Prince of Darkness, will join his Black Sabbath bandmates for the all-star, all-day fundraising festival at Villa Park in their home city of Birmingham.
Ozzy, who has Parkinson’s disease as well as leg, neck and back issues, has not played a full concert for six years.