He dated Leslie Caron, Joan Collins, Madonna and Diane Keaton.
Only three times in Academy Award history have director-collaborators been nominated for Best Directing Oscars: Robert Wise and Jerome Robbins for West Side Story (1961), Warren Beatty and Buck Henry for Heaven Can Wait (1978) and Joel Coen and Ethan Coen for No Country for Old Men (2007). (Wise/Robbins and the Coens actually won the award).
He is the godfather of longtime friend Richard Sylbert daughter, Daisy Alexandra Sylbert.
His two favorite cartoon characters are Daffy Duck (who is his all time favorite) and Johnny Bravo.
Has expressed interest in producing, directing and starring in a live action Pokemon movie, with himself playing the villain Giovanni, as Pokemon is his youngest's and second youngest's favorite cartoon.
Turned down a role in Bob & Carol & Ted & Alice (1969).
Claims he was offered the lead role in Rocky (1976).
Was offered the role of Richard Nixon twice in his career. With Oliver Stone in "Nixon" (1995) and with Ron Howard in "Frost/Nixon" (2008).
Was offered the lead role in Jade (1995) but turned it down. David Caruso signed on to star instead.
Long planned a biopic of Howard Hughes to produce and star in. It has yest to be made and it's uncertain whether or not Beatty has actually completed a script or if he also plans on directing it.
What's New Pussycat (1965), a name he often called girlfriends, was written for him, but he turned down the role when Leslie Caron - his current flame - was turned down by producers for the other lead.
A political liberal, he personally campaigned for South Dakota Senator George McGovern in the New Hampshire Democratic Presidential primary in 1972.
Received the Irving Thalberg Memorial Award at The 72nd Annual Academy Awards (2000) (TV), presented to him by his friend and neighbor Jack Nicholson.
Turned down the role of Jack Horner in Boogie Nights (1997). He later said that it was one of the few choices in his career that he regretted. Burt Reynolds garnered an Academy Award nomination for his performance in the film.
His performance as Clyde Barrow in Bonnie and Clyde (1967) is ranked #32 on the American Film Institute's 100 Heroes & Villains. This is ranking he shares with Faye Dunaway, who portrayed Bonnie Parker.
Oliver Stone tried casting him twice - once as Gordon Gekko in Wall Street (1987) and then as Richard M. Nixon in Nixon (1995).
He is the only person to be nominated for 4 Academy Awards (Best Picture, Directing, Lead Actor & Screenplay) in the same year in two-times. First for Heaven Can Wait (1978), later for Reds (1981).
After coming to New York at 19 to pursue an acting career, he temporarily supported himself by working as a sandhog during the building of a new tube of the Lincoln Tunnel between New York and New Jersey.
Has produced two films that were nominated for Best Picture and had acting nominations in all four roles: Bonnie and Clyde (1967) and Reds (1981)
Once worked as a cocktail lounge pianist.
Became close to Robert F. Kennedy during his 1968 campaign for the Democratic presidential nomination. Beatty's relationship with Robert F. Kennedy was closer than the one Beatty had had with John F. Kennedy. Beatty was particularly valuable during the campaign in firing up volunteers for such mundane activities as door-to-door canvassing. Robert F. Kennedy was impressed by Beatty's thorough understanding of the issues. After the assassination of Robert F. Kennedy in Beatty's hometown of Los Angeles, Beatty became a vocal gun control advocate.
Beatty first espied future long-term lover Julie Christie at the 1967 Royal Command Performance of the film Born Free (1966) in London, which he attended with his then-girlfriend, Leslie Caron. Caron and Beatty were situated near Christie in the reception line for Queen Elizabeth II, and Beatty first saw Christie in person when he turned to watch the Queen shake hands with her. Beatty inveigled his friend 'Richard Sylbert' to tell her to call him. She did, he flew up to the San Francisco location of the Petulia (1968) shoot and, after a rocky start, they became lovers. She made her first public appearance with Beatty at a sneak preview of _Bonnie and Clyde (1967)_ for the Hollywood elite. It took them several months to rid themselves of their then-current lovers before they came together in a committed relationship, although they usually maintained separate households for the length of their long romance. Most of those who knew them said they shared a passion for the truth. Beatty told his friends he had asked Christie to marry him, but she refused as she did not want children. While filming 'Shampoo' in 1974, Beatty bought his dream house and brought Christie over to view it. When she realized he had already assigned several rooms as nurseries, it dawned on her that their ideas for the future were too far apart to be able to maintain their relationship. She ended her long love affair with Beatty by phone, in the fall of 1974. His longest and most lasting relationship until he married Annette Bening, the mother of his four children, Beatty considered Christie his wife and told the press in 1971 that he would pay her alimony if they split up, if she wanted it. They did, but she didn't. When Beatty was awarded the Irving Thalberg Award by the Academy of Motion Picture Arts & Sciences in the year 2000, Christie was one of the friends and co-workers who appeared in a film tribute to her former lover.
Turned down the lead in The Way We Were (1973), Beatty also rejected Butch Cassidy and the Sundance Kid (1969) because he wanted to work with George Stevens on The Only Game in Town (1970). Turned down The Sting (1973) and The Great Gatsby (1974) so that he could devote his time to the George McGovern presidential campaign.
A relative of his on his mothers side was the last sitting Communist member of the Canadian Parliament.