Milos Forman has never rebelled against his films being labelled “quintessentially American” — he is just not a revolutionary type, he says — but the Czech-born director passionately dismisses such categorisation every time he is asked about it.

“For me, ‘One Flew Over the Cuckoo’s Nest’ is a Czech film, because when you are young in a communist country, all you dream about is breaking free,” he says of his 1975 film set in a psychiatric hospital, which earned him his first Oscar and established him as one of the world’s most prominent film-makers.

“Hair” (1979), another Forman movie now considered a classic, “was about young people rising up against the status quo — something we all dreamt about under communism but didn’t dare to do,” says the 70-year-old director…