After Santa Ana High School, she tried to get further education in both Santa Ana College and Orange Coast College, but she did not finish none of them. She decided rather to spend her time developing her career as an actress in Manhattan. At that time she consciously changed her last name from Hall to Keaton, because she found out about another actress Daine Hall and she wanted to be unique. Living in New York she attended Neighborhood Playhouse where she studied acting.

The first noticeable work of Diane Keaton was in 1968 in Broadway run of Hair where she had to play nude but refused to do it. Due to this fact, she was noticed by Woody Allen and got the part in his production of Play It Again, Sam. For this play, Diane Keaton was nominated for Tony Award. In that same year occurred her first film debut in Lovers and Other Strangers.

Thanks to her participation in Lovers and Other Strangers, in 1972 she got the role of Kay Adams in American crime film The Godfather as a wife of Michael Corleone. After that, her career started to grow with enormous steps. She played in films: Sleeper (1973), The Godfather Part II (1974), Love and Death (1975), Harry and Walter Go to New York (1976), Looking for Mr. Goodbar (1977), Interiors (1978), Manhattan (1979), The Godfather Part III (1990) and many others, played in almost 50 movies and 15 TV show and series. During whole her career she was nominated six times on Golden Globe, twice won Golden Globe and 47 times was nominated on or won other different awards. Such exciting career brought her big money. According to some open sources on the internet, her net worth is about 32 million dollars.

As for her personal life, she had a relationship with Woody Allen but it hasn’t lasted for a long time, eventually they remained just friends. Her next affair was with Warren Beatty. They starred together in the film “Reds” and this star couple attracted a lot of attention to press. Relationship with Warren Beatty also ended after short time. After Beatty, Diane Keaton has dated with Al Pacino during filming of all three parts of The Godfather.

In 1996, when she was 50 years old, since she had not her own children, she decided to adopt a daughter named Dexter. After five years, she adopted another child, this time a boy named Duke. At this time, she still has two adopted children and she still is not married.