Billy Wilder won two Oscars - as co-screenwriter and director - for this mordant comedy about getting ahead in the corporate world. Jack Lemmon played the 'schnook' who lends out his apartment for his boss's sexual trysts, only to fall in love with the boss's girl - played by Shirley MacLaine. The Apartment is a beautifully judged piece of writing saved from cynicism by Wilder and Diamond's tenderness towards their central characters.