The Courtneys of Curzon Street (also titled The Courtney Affair or Kathy's Love Affair, in the U.S.) is a 1947 British drama film starring Anna Neagle and Michael Wilding. It is a postwar, reconstruction-era movie following a family through four generations and their sacrifices in wars and accompanying social changes. It is a study of class division and snobbery in Britain in the late 19th and early 20th centuries with a message that the sacrifices of war have been worthwhile and have been accompanied by social change and that people are now freer to make their own choices about their lives.

The film is one of the most seen British films of all time, with 15.9 million tickets sold at the cinema.