Ryan O'Neal and Ali MacGraw in "Love Story" (1970). O'Neal, who appeared on TV in the 1960s in the soap opera "Peyton Place," became a global star in the Oscar-winning romance, and received an Oscar nomination for Best Actor.
In this March 5, 1989 file photo, actors Ryan O'Neal, left, and Farrah Fawcett are shown at the premiere of the film "Chances Are," in New York.
O'Neal was previously married to actresses Joanna Cook Moore (with whom he had Tatum O'Neal and Griffin O'Neal), and "Big Bounce" co-star Leigh Taylor-Young (mother of Patrick O'Neal), before beginning his long-term relationship with Fawcett, They had one child together, Redmond James Fawcett O'Neal, born in 1985.
Ryan O'Neal with Leigh Taylor-Young in "The Big Bounce" (1969), a crime story based on an Elmore Leonard novel.
William Holden and Ryan O'Neal in Blake Edwards' buddy western "Wild Rovers" (1971).
Barbra Streisand and Ryan O'Neal in Peter Bogdanovich's sterling screwball comedy "What's Up, Doc?" (1972). O'Neal memorably replied to Streisand's utterance of a classic "Love Story" line - "Love means never having to say you're sorry" - with "That's the stupidest thing I ever heard."
Ryan O'Neal is a novice jewel thief in "The Thief Who Came to Dinner" (1973), with Jacqueline Bisset.
Peter Bogdanovich's Depression-era comedy "Paper Moon" (1973) starred Ryan O'Neal and his daughter, Tatum O'Neal, as con artists in the American Midwest. Tatum won an Oscar for Best Supporting Actress - at the age of 10, the youngest winner ever.
Ryan O'Neal starred in Stanley Kubrick's picaresque period epic "Barry Lyndon" (1975), about the rise and fall of a soldier, gambler and social climber.
Ryan O'Neal and Marisa Berenson in Stanley Kubrick's "Barry Lyndon" (1975).
Ryan and Tatum O'Neal reunited with director Peter Bogdanovich for "Nickelodeon" (1976), a comedy about the early days of motion pictures.
Ryan O'Neal is "The Driver" (1978) in Walter Hill's actioner, which co-starred Bruce Dern and Isabelle Adjani.
Years after the fated romance of "Love Story," Ryan O'Neal returned for a film version of writer Erich Segal's sequel, "Oliver's Story" (1978), starring Candice Bergen. The film's ad line ("It takes someone very special to help you forget someone very special") didn't draw in audiences who couldn't forget the original's Ali McGraw-Ryan O'Neal pairing.
Ryan O'Neal and Barbra Streisand got back into the ring together for the romantic comedy "The Main Event" (1979).
Shelley Long and Ryan O'Neal in the comedy-drama, "Irreconcilable Differences" (1984), in which daughter Drew Barrymore sues to divorce her parents.
In this Nov. 7, 1987 file photo, actress Farrah Fawcett is kissed by Ryan O'Neal as they arrive for the screening of "Poor Little Rich Girl: The Barbara Hutton Story," in Los Angeles.
Ryan O'Neal starred with Isabella Rossellini in the film adaptation of Norman Mailer's murder mystery "Tough Guys Don't Dance" (1987), directed by the author himself.
Al Pacino played a publicist hired by actor-turned-politico Ryan O'Neal to help make a potential scandal disappear in the 2002 drama "People I Know."
Bill Pullman plays a private detective hired by a millionaire (Ryan O'Neal) who is being blackmailed in "Zero Effect" (1998).
Ryan O'Neal, Tatum O'Neal and Peter Bogdanovich are shown at the "Paper Moon" 30th Anniversary Screening and handprint ceremony on August 21, 2003, held at The Vista Theatre in Silverlake, Ca.
Actors Ryan O' Neal and Farrah Fawcett attend the Share, Inc., 51st Annual Boomtown Party at the Century Plaza Hotel & Spa on May 15, 2004 in Century City, California. Actor Sharon Stone and Kelly Stone Singer, founders of 'Planet Hope' were honored at the event.
Ryan O'Neal touches the back of the hearse carrying Farrah Fawcett's casket after her funeral service on Tuesday June 30, 2009 in Los Angeles.
Tatum O'Neal, at left, and Ryan O'Neal arrive at the eighth annual TV Land Awards on Saturday, April 17, 2010, in Los Angeles.
Actors Ryan O'Neal and Tatum O'Neal attend the closing night screening of "First Grader" at the Palm Springs High School during the 22nd Annual Palm Springs International Film Festival on January 16, 2011 in Palm Springs, California.