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Biography from Leonard Maltin's Movie Encyclopedia:
Lusty actress whose naturalistic, uninhibited acting style made her one of the screen's most desirable leading ladies. Cannon began her performing career as a singer in her mother's synagogue; she subsequently moved to Los Angeles, where she worked as a model. Billed as Diane Cannon, she made her movie debut in the forgettable This Rebel Breed (1959), and was seen in The Rise and Fall of Legs Diamond (1960). In 1961 she met Cary Grant and allowed her career to languish while she concentrated on their relationship; they lived together for three years before getting married in 1965. The union lasted only a few years, ending in an acrimonious divorce proceeding. (Although it produced Grant's-and Cannon's-only child, daughter Jennifer.)
Cannon resumed her acting career in 1969, winning almost overnight stardom as the prudish wife in Bob & Carol & Ted & Alice for which she was Oscarnominated as Best Supporting Actress. The 1970s were good years for Cannon, who appeared in The Love Machine, Such Good Friends (both 1971), The Anderson Tapes, The Burglars (both 1972), Shamus, The Last of Sheila (both 1973), The Virginia Hill Story (a 1974 TV movie in which she played the same character portrayed by Annette Bening in 1991's Bugsy), Heaven Can Wait (earning a second Oscar nomination), and Revenge of the Pink Panther (both 1978).
Eager to learn about filmmaking, she enrolled in an AFI workshop, and in 1976 she produced a short about preadolescent sexual curiosity called Number One which received an Oscar nomination for Best Live-Action Short Subject. She followed this with an ambitious feature (in which she also starred), For the First Time (1979). After making Coast to Coast, Honeysuckle Rose (both 1980), Deathtrap and Author! Author! (both 1982), Cannon became less active on-screen, turning up more often in made-for-TV movies and miniseries. She spent several years making (and trying to finance) an autobiographical feature, The End of Innocence which finally saw release in 1991. But at least in the TV arena, she remains a viable leading lady, still vibrant (and sexy) in her 50s. Arnold Schwarzenegger directed her in his cable-TV movie Christmas in Connecticut (1992). She also costarred in The Pickle (1993).