Ranked #1 in TV Guide's list of "TV's 25 Greatest Teen Idols" (23 January 2005 issue).

His hit song 'I Think I Love You' was featured and sung on the album 'You and Me' by Declan Galbraith.

(January 2008) He, Sue and Beau live in Ft Lauderdale, Florida.

(January 2007) Before relocating to his present home in Las Vegas, NV, Cassidy & his family resided for several years in the Fairfield County town of Ridgefield, Connecticut.

Best known by the public for his role as Keith Partridge on "The Partridge Family" (1970).

He was a close friend of John Lennon, whom he greatly admired.

Ranked #98 on VH1`s 100 Sexiest Artists.

Claimed in his 1994 autobiography that he turned down an offer in the early 70s to record an album of songs written by Lou Reed and produced by David Bowie (who wanted to experiment with his teenybopper image).

Made his Broadway debut in 1969 in the musical "The Fig Leaves Are Falling" at the same time his father Jack Cassidy and stepmother Shirley Jones opened on Broadway in "Maggie Flynn". Both shows were notorious flops, the former closing after four performances.

Out of the approximate $500 million that "The Partridge Family" (1970) made, he was initially paid $600 per week, but commanded upwards of $50,000 per concert appearance. His renegotiated contract boosted his weekly salary to $6,000 per week plus some participation.

At his peak, Cassidy was the world`s highest paid live entertainer, and his official fan club was the largest in pop history -- exceeding Elvis Presley and The Beatles.

Allergic to garlic.

14 year-old fan Bernadette Whelan died of heart failure on 30 May 1974, from injuries sustained while attending a 26 May Cassidy show at London`s White City Stadium. 650 fans were injured in a crush. Cassidy was so affected that he quit both touring and "The Partridge Family" (1970).

In an attempt to break from his Keith Partridge persona, he posed nude for Annie Leibovitz for a photo in the 11 May 1972 "Rolling Stone" magazine.

Daughter Katie Cassidy is a singer who recently covered her father`s song "I Think I Love You." She was featured in a VH1 five-part documentary series on the last forty years of teen music performers, Bubblegum Babylon (2002) (TV).

Starred in the play "Time" in London with Laurence Olivier in 1987. It was Olivier`s final stage performance (although he was only seen via a previously filmed segment).

Has a daughter, Katie Cassidy, a.k.a. Katherine Evelyn Benedon, born 25 November 1986, from a previous relationship.

Former stepson of Shirley Jones. Former stepson of Elliot Silverstein.

Half-brother of Shaun Cassidy, Ryan Cassidy, and Patrick Cassidy.

He appeared in the music video and sang in the choir on the song "Voices That Care."

Had an operation at age 11 on his left optical nerve which was wrapped around a blood vessel, sometimes resulting in a "lazy" eye when he`s over-tired, and had his gall bladder removed in 1972 after a concert in Wildwood, New Jersey.

Son of actress Evelyn Ward and actor Jack Cassidy.

David`s son, Beau, with Sue Shifrin was born in 1991.

Spouse: Sue Shifrin (30 March 1991 - present) 1 child; Meryl-Ann Tanz (15 December 1984 - 1986) (divorced); Kay Lenz (3 April 1977 - 1981) (divorced)

Born in NYC