A two-time victor of the Academy Award for Best Director, the "One Flew Over the Cuckoo's Nest" and "Amadeus" helmer also won three Golden Globes, the Cannes Film Festival's Grand Prize of the Jury (for "Taking Off"), the Golden Bear at Berlin ("The People vs. Larry Flynt"), a BAFTA award, and numerous other accolades.
Forman passed away on Friday in the United States, where he lived, after a short illness, his wife, Martina, told Czech news agency CTK on Saturday.
Later works included "Valmont" (1989), "The People vs. Larry Flynt" (1996), which garnered Forman another best director Oscar nomination, "Man on the Moon" (1999) and "Goya's Ghosts" (2006).
Considered one of the pioneers of the Czechoslovak New Wave, Forman left his home country in 1968 after his films, particularly The Fireman's Ball, got in trouble with the administration.
"One Flew Over the Cuckoo's Nest", adapted from Ken Kesey's 1962 novel, dealt with life inside an OR mental institution.
Amadeus (1984), starring Tom Hulce as Wolfgang Amadeus Mozart, raked in 11 Oscar noms and eight wins, including those for best picture and director.
"In his films you can see the author", he said.
Working with non-actors, Forman once revealed his strategy when making a film - the entire crew must have fun.
Jan Tomas Forman is born in Caslav in the former Czechoslovakia.
Milos Forman poses during a photo call after being awarded for his contribution to cinema during the second edition of the Lumiere 2010 Film Festival in Lyon, eastern France. Both of his parents died in Nazi concentrations camps during the Holocaust in World War II.
His satire "The Fireman's Ball" was banned in Czechoslovakia in 1968 after the Soviets invaded and crushed any liberal strides the country had made.
"When we started to make our films, they were really Czech films about Czech society and Czech little people - and who cares about Czech little people?"
"No matter what subject or genre he tackles, Miloš finds the universality of the human experience in every story, allowing us - his rapt audience - to recognize ourselves within the struggle for free expression and self-determination that Miloš so aptly portrays on the silver screen", past DGA President Taylor Hackford said at the time. It also won Best Picture, Best Actor, Best Actress, and Best Adapted Screenplay.
Milos leaves behind wife Martina and his four sons - Andrew and James, and twins Matej and Petr Forman from his second marriage to Vera Kresadlova.