British movie greats Sir Michael Gambon and Alfred Molina are to play unlikely lovers in a new movie.

Love is Strange, which will be shot in New York City this year, follows the fortunes of a down-on-their-luck gay couple, forced to move out of their apartment and separate when officials at the Catholic high school where Gambon's character works fire him after he weds his longtime partner.

One of the men moves in with his nephew and his family in Brooklyn, while the other is taken in by two gay cops.

"Molina and Gambon will be amazing as the couple at the centre of the film, bringing great depth and heart to this highly emotional story," director Ira Sachs says.