Osbourne and the rest of her immediate family (without Aimee) were thrust into the international spotlight with the MTV reality show The Osbournes, which aired from 2002 to 2005. The series chronicled their day-to-day life, and the show became a hit for its portrayal of a dysfunctional, though close-knit family in which metal music, profanity and other harshness were a daily part of life. Kelly, the middle child, emerged (according to Rolling Stone) as "a wickedly funny, brutally honest, pint-size, potty-mouthed spitfire." The series started when she was seventeen, and ended when she was twenty. Kelly said in an interview for The Osbournes DVD that the crew were only actually supposed to be there for a few weeks but ended up staying for a few months and that the constant cameras focusing on her and her family was stressful.
Both she and the Osbourne family have been parodied in Channel 4 comedy, Bo' Selecta in which the rubber-masked Kelly, played by Leigh Francis, has her own show and is always being censored for swearing with bleeps.
In March 2009, Osbourne returned to television with the rest of the Osbourne family on Osbournes: Reloaded.