Leo the Last

Leo the Last is a 1970 British drama film directed by John Boorman, based on the play The Prince by George Tabori, starring Marcello Mastroianni and Billie Whitelaw.

Gradually he is stirred from his emotional detachment to try to assist her, a development that confuses, alarms, and angers his parasitic entourage Margaret, his social climber fiance, Max, the shady family lawyer who for reasons never directly explained is desperate for Leo to marry Margaret, David, his quack doctor, and Laszlo, the household manager and apparent leader of a secret society aiming to restore the dynasty. Leos sudden vitality also threatens Jasper the pimp who is, in fact, in league with Lazlo.A pacifist and liberal idealist with no interest in reigning, Leo is relieved when Laszlo confesses that the society is a fraud but furious when he discovers that he is the owner of the slum and his life of wealth and privilege has been paid for from its rents. ........

Source: Wikipedia