Early lifeDavid Cassidy was born at Flower Fifth Avenue Hospital in New York City, the son of actor Jack Cassidy and actress Evelyn Ward. His father was of half-Irish and half-German ancestry, and his mother was of mostly Colonial American descent, along with smaller amounts of Irish and Swiss. Some of his mother's ancestors were among the founders of Newark, New Jersey.As his parents were frequently touring on the road, he spent his early years being raised by his maternal grandparents in a middle-class neighborhood in West Orange, New Jersey. In 1956, he found out from neighbors' children that his parents had been divorced for over two years and had not told him. David's parents had decided because he was at such a young age, it would be better for his emotional stability to not discuss it at that time. They were gone often with theater productions and home life remained the same.In 1956, his father married actress Shirley Jones, and three half-brothers were born: Shaun (1958), Patrick (1962) and Ryan (1966). As a young teen he moved into Shirley's home in Beverly Hills where his father and half-brothers resided. David remained there seeking fame as an actor/musician until he moved out when his career began to flourish.CareerOn January 2, 1969, Cassidy made his professional debut in the Broadway musical The Fig Leaves Are Falling. It closed after four performances but a casting director saw the show and asked Cassidy to make a screen test. In 1969, he moved to Los Angeles.After signing with Universal Studios in 1969, Cassidy was featured in episodes of the TV series Ironside, Marcus Welby, M.D., Adam-12 and Bonanza. In 1970, he took the part of Keith Partridge, son of Shirley Partridge, who was played by Cassidy's real stepmother and series' lead, Shirley Jones. The Partridge Family series creator Bernard Slade and producers Paul Junger Witt and Robert "Bob" Claver did not care whether Cassidy could sing, knowing only that his androgynous good looks would guarantee success. But shortly after production began, Cassidy convinced music producer Wes Farrell that he was good enough and he was promoted to lead singer for the show's recordings. Once "I Think I Love You" became a hit, Cassidy began work on solo albums as well. Within the first year he had produced his own single, "Cherish" (from the album of the same title), which reached No. 9 in the US, No. 2 in the UK and No.1 in Australia and New Zealand. He began tours that featured Partridge tunes and his own hits. Though he strove to become a respected rock musician along the lines of Mick Jagger or Alice Cooper, his channel to stardom launched him into the ranks of teen idol, a brand he loathed until much later in life when he managed to come to terms with his bubblegum pop beginnings.Ten albums by The Partridge Family and five solo albums were produced during the show with most selling more than a million copies each. Internationally, Cassidy's solo career eclipsed the already phenomenal success of The Partridge Family. He became an instant drawcard with spectacular sellout concert successes in major arenas around the world. These concerts produced mass hysteria resulting in the media coining the term "Cassidymania". By way of example, he played to two sellout crowds of 56,000 each at the Houston Astrodome in Texas over one weekend in 1972. His concert in New York's Madison Square Garden sold out in one day and resulted in riots after the show. His concert tours of the UK sold out and included six sellout concerts at Wembley Stadium over one weekend in 1973. In Australia in 1974, the mass hysteria was such that there were calls to have him deported from the country, especially after the madness at his 33,000 audience concert at Melbourne Cricket Ground.A turning point in his live rock concerts (while still filming The Partridge Family) was a gate stampede which killed a teenage girl. At a show in London's White City Stadium on May 26, 1974, 650 were injured in a crush at the front of the stage. Thirty were taken to the hospital, and one, 14-year-old Bernadette Whelan, died on May 30 from injuries. The show was the penultimate date on a world tour. A deeply affected Cassidy faced the press, trying to make sense of what had happened. Out of respect for the family and to avoid turning the girl's funeral into a media circus, Cassidy did not attend the service. He did, however, speak to Whelan's parents and send flowers. Cassidy stated at the time that this would haunt him until the day he died.Cassidy's 1994 autobiography, C'mon Get Happy: Fear And Loathing On The Partridge Family Bus, provides an account of most aspects of his fame, including contracts, money and his fanatical worldwide fan following.--The New Musical Experience Magazine, October 1972.By this point, Cassidy had decided to quit both touring and acting in The Partridge Family, concentrating instead on recording and song-writing. International success continued, mostly in Great Britain and Germany, when he released three well-received solo albums on RCA between 1975 and 1977. Cassidy became first to have a hit with "I Write the Songs", a Top 20 record in Great Britain before the song became Barry Manilow's signature tune. Cassidy's recording was produced by the song's author-composer, Bruce Johnston of The Beach Boys.In 1978, Cassidy starred in an episode of Police Story titled "A Chance To Live," for which he received an Emmy nomination. NBC created a show based on it, called David Cassidy: Man Under Cover, but it was canceled after one season. (A decade later, the successful Fox series 21 Jump Street used the same plot, with different youthful-looking police officers infiltrating a high school.)In 1985, music success continued with the Arista release of the single "The Last Kiss" (#6 in the UK), with backing vocals by George Michael, which was included on the album Romance. These went gold in Europe and Australia and Cassidy supported them with a sellout tour of the UK, which resulted in the Greatest Hits Live compilation of 1986. Michael cited Cassidy as a major career influence and interviewed Cassidy for David Litchfield's prestigious Ritz Newspaper.Cassidy returned to the American Top 40 with his 1990 single "Lyin' To Myself," released on Enigma Records. In 1998, he had an AC hit with "No Bridge I Wouldn't Cross" from his album Old Trick, New Dog. His 2001 album Then And Now went platinum internationally and returned Cassidy to the Top 5 of the UK album charts for the first time since 1974.Cassidy has performed in musical theatre. In 1981, he toured in a revival of a pre-Broadway production of Little Johnny Jones, a show originally produced in 1904 with music, lyrics, and book by George M. Cohan. (The show is excerpted in the biographic film Yankee Doodle Dandy (1942), when James Cagney sings "Give My Regards to Broadway" and "The Yankee Doodle Boy".) However, Cassidy received negative reviews, and he had been replaced by another former teen idol, Donny Osmond, by the time the show reached Broadway. Cassidy, in turn, was himself a replacement for the lead in the original 1982 Broadway production of Joseph and the Amazing Technicolor Dreamcoat. He appeared in London's West End production of Time and returned to Broadway in Blood Brothers alongside Petula Clark and his half-brother, Shaun Cassidy. In concert performances in 1990, Cassidy hired his recalcitrant TV brother Danny Bonaduce as his warm-up act. In 1995, he hosted the VH1 show 8-Track Flashback, which ran until 1998. In 1996, he replaced Michael Crawford in the Las Vegas show EFX, re-writing it into one of the Strip's favorite shows – although Cassidy was forced to resign after he injured his foot during a performance. He also created The Rat Pack is Back, in which he made guest appearances as Bobby Darin, which ran successfully. In 2000, he wrote and appeared in the Las Vegas show At the Copa with Sheena Easton, as both the young and old versions of the lead character, Johnny Flamingo. In 2005, Cassidy played the manager of Aaron Carter's character in the film Popstar. In 2006, as well as performing with Peter Furniss and Thomas Bowles, he made a guest appearance for BBC Children in Need performing live, then assisting Terry Wogan collecting donations from the studio audience.He co-starred alongside his brother Patrick in a 2009 ABC Family short-lived comedy series titled Ruby & The Rockits, a show created by his brother Shaun.Cassidy was one of the contestants on Celebrity Apprentice in 2011, in which his daughter Katie Cassidy made a brief appearance at her father's request. In the years since then, Cassidy has maintained a regular tour schedule with concert appearances across the USA and the UK.Personal lifeCassidy's first wife was actress Kay Lenz, whom he married on April 3, 1977, and divorced on December 28, 1983, although one reference claims 1982.His second wife was South African sportswoman Meryl Tanz, whom he married in 1984. Tanz, a horse breeder, introduced Cassidy to thoroughbred horse racing. This marriage ended in 1985, or 1986.He has a daughter, actress Katie Cassidy, born in 1986, from a relationship with Sherry Benedon.David Cassidy has a son with Sue Shifrin, Beau Devin Cassidy, born February 8, 1991. Cassidy and Shifrin married on March 30, 1991, his third and her second marriage. On August 25, 2013, Cassidy's Los Angeles publicist confirmed that the couple had separated.Cassidy has written a memoir that was published in the UK in March 2007. Could It Be Forever? My Story gives details of his personal life.Cassidy's father Jack is credited with setting his son up with his first manager. After signing with Universal Studios in 1969, Jack introduced him to former table tennis champion and close friend Ruth Aarons, who later found her niche as a talent manager, given her theater background. Aarons had represented Jack and Shirley Jones for several years prior, and would later represent Cassidy's half-brother Shaun. Aarons became an authority figure and close friend to Cassidy, and would prove to be the fighting force behind his on-screen success. After making small wages from Screen Gems for his work on The Partridge Family during season one, Aarons discovered a loophole in his contract and renegotiated it with far superior terms, and a four-year duration, a rare stipulation at the time.Arrests for DUICassidy was first arrested for DUI in Florida on November 3, 2010. He was arrested for DUI a second time in Schodack, New York in the early hours of August 21, 2013. He was pulled over after failing to dim his headlights as he passed a police car going in the opposite direction. After performing poorly on a field sobriety test, Cassidy was subjected to an alcohol breath test returning a blood alcohol level of 0.10, which is above the New York State legal limit of 0.08.The arresting officer, named Tom Jones, reported that Cassidy was polite and courteous, and jokingly asked officer Jones "What's New Pussycat?" in reference to the 1965 hit song by the singer Tom Jones. Cassidy was subsequently charged, taken to jail, and released several hours later on $2500 bail. He now faces felony charges because of his prior DUI in Florida in 2010. Cassidy was required to appear before a town judge in Schodack, NY in September 2013. He publicly admitted he had an alcohol problem in 2008.Cassidy was arrested on suspicion of DUI a third time in California on January 10, 2014 after he made an illegal right turn against a red light. He was held overnight in jail and was scheduled to appear in court on February 5.ActivismIn 2011, Cassidy recorded a public service announcement for Alzheimer's research and prevention—due to his mother, Evelyn Ward, having the disease—and said that he will champion that cause whenever possible. He planned to address Congress in 2012.Cassidy is a long-time registered Democrat. Describing Republican candidates for president Mitt Romney and Newt Gingrich as a panelist on The Colbert Report, Cassidy stated, "I believe the both of them are the most embarrassing, sad, pathetic... I mean, really, this is the best we can do?"Portrayals in mediaIn 1999, ABC produced a TV-movie biography based on The Partridge Family entitled, Come On Get Happy: The Partridge Family Story based on former co-star Danny Bonaduce's account behind the popular series and personal life regarding himself and Cassidy. Cassidy was portrayed by Rodney Scott and Bonaduce was portrayed by Shawn Pyfrom.On January 9, 2000, NBC premiered a television movie based on the life and short-lived success of Cassidy entitled The David Cassidy Story. While the former TV biopic focuses on both Bonaduce and Cassidy's personal lives, this television film focused mainly on Cassidy's rise to fame and unconventional early life. In this film, Cassidy is portrayed by Andrew Kavovit.In September 2011, Anchor Books released the novel I Think I Love You by Allison Pearson. Spanning 20 years, it chronicles Petra, a 13-year-old Welsh girl at the beginning of the book, who's infatuated with David Cassidy and then jumps to Petra's middle-aged years when she has a chance to meet Cassidy.