John Michael "Ozzy" Osbourne (born 3 December 1948) is an English heavy metal singer.

Osbourne was born in Marston Green, England. He grew up in Aston, Birmingham, England. He has dyslexia. He was convicted of burglary when he was a teenager, for which he was fined. He was sent to prison for not paying the fine.

Osbourne was the lead singer for Black Sabbath between 1968 and 1978. He joined again in 1997 for occasional tours. He bit the head off of a bat on stage once. Osbourne wrote a song called 'Suicide Solution' that was heavily ridiculed claiming it was about suicide, which coincided with the words "shoot, shoot" whispered in the song. It was really a tribute to his friend Bon Scott, lead singer of AC/DC, who died of alcohol poisoning.

He and his wife Sharon have three children together: Aimee, Kelly and Jack. He also has three children from his first marriage to Thelma Riley: Elliot, Jessica, and Louis.

Osbourne released his first solo album, Blizzard of Ozz in 1980.

He was diagnosed with Parkinson's disease in February 2019, which he publicly revealed in January 2020.