She was born Sharon Rachel Levy in London to an Ashkenazi Jewish father and an Irish Catholic mother. She met Ozzy Osbourne at age 17 while working as a receptionist for her father, who had been looking to manage Ozzy's band Black Sabbath. When Ozzy was fired from Black Sabbath in 1979, Sharon took over his management from the Arden organization. Proving to be as hardworking and ruthless as her father, Sharon coordinated the recruitment of both a technically gifted backing band The Blizzard of Oz and by utilising proven songwriters helped Ozzy kick off what became a highly successful solo career. A series of high selling albums and world tours followed through the 1980s, eventually making Ozzy one of the most popular metal acts in the world. In 1996 she created the Ozzfest summer touring festival.

Sharon and Ozzy were married in Maui, Hawaii on July 4, 1982. They bought out Ozzy's contract from her father in that year for GBP 1,500,000, a move that destroyed her relationship with her father for nearly 20 years. Sharon was so estranged from her parents that when her mother, Hope, died in 1998, she had not met her grandchildren, and Sharon did not attend the funeral. However, Sharon and her father were reconciled in 2001, after Sharon glimpsed him on a Los Angeles street.

Sharon gained celebrity as one of the stars of MTV's reality show, The Osbournes, about her family's daily life. As the person who negotiated with MTV to tape the show, she is often credited with her husband's emergence from heavy metal icon to mainstream celebrity. The show began airing in early 2002, and when, in July 2002, Osbourne was diagnosed with cancer, she insisted filming continue. The final episode of the show aired in the US on March 21, 2005. MTV's British affiliate, has been airing the show since 2003.

In 2003 Sharon became the host of her own television talk show, The Sharon Osbourne Show. The show was meant to be a reflection of her personality and her home life – similar to her reality show but with the inclusion of guest interviews and performances. However, it was never very successful in the ratings and critics panned her inability to perform the basic tasks required of a talk show host such as reading cue cards and conducting interviews. Eventually the show's format became extremely standardised – not at all what Osbourne had wanted. A sequence on her reality show found her struggling to book any noteworthy celebrity guests because their agents did not feel an appearance would be beneficial. The show was cancelled in early 2004.

At a charity auction, Sharon bid for and won the opportunity to guest star in an episode of the NBC comedy Will & Grace. She played a bartender in a spring 2004 episode.

In October 2004, Sharon announced that she and husband Ozzy would be teaming up for yet another MTV show entitled "Battle for Ozzfest", in which a group of unsigned bands battle it out for a spot on the 2005 Ozzfest tour.

In January 2005 she was selected to feature in advertising for the United Kingdom supermarket chain ASDA.

She is also one of the judges on the award-winning British TV talent show The X Factor in both 2004 and 2005.

--Wikipedia