Jack Osbourne is an English media personality, best known as the son of musician Ozzy Osbourne and music manager Sharon Osbourne, and brother of Aimee and Kelly Osbourne.

Osbourne was born in St John's Wood, London. He has two older sisters, Aimee Osbourne and Kelly Osbourne, and also two elder half-siblings; Jessica Hobbs and Louis Jon Osbourne, both of whom are from Ozzy's previous marriage to Thelma Riley.The Osbournes have many pets, and Jack owns a female bulldog named Lola. Jack says that his childhood years were "perfectly happy and contented". For the first six years of his life he lived in the Chiltern Hills in Buckinghamshire. When he was six, Sharon and Ozzy decided to move the family to L.A., but a year later the family moved back to Buckinghamshire. When Jack was eleven, the family moved back to Southern California, but this time to Beverly Hills. In spite of moving so many times at a young age, Jack claims "he didn't find it too disruptive".

The only aspect of his life that constant moving did affect was his school life, and Jack soon despised going to school, which was not helped by the fact that when he was eight he was diagnosed with a form of dyslexia, and when he was ten he was diagnosed with ADD. At the time, Jack was studying at a Christian school in L.A., but their attitude was "pray hard and you'll get better"and Jack returned to England again for a year, before returning to L.A. This time Jack did not return to the Christian school, but was enrolled into a special needs school (Park Century School), and was prescribed Ritalin to combat his ADD. Jack had been on the road with Ozzy throughout much of his childhood, and when he was fourteen he was offered an internship at Virgin Records while Sharon was managing The Smashing Pumpkins on this label.

On April 21, 2003, Jack Osbourne was admitted to a child psychiatric ward for an addiction to OxyContin