Sir or Madam (German: Ossi hat die Hosen an) is a 1928 British-German silent comedy film directed by Carl Boese and starring Margot Armand, Percy Marmont and Ossi Oswalda. It was based on the 1923 novel Sir or Madame by Berta Ruck and shot at Elstree Studios near London. The film was a co-production between Germany and Britain, with separate versions released in the countries. In Britain it was not released until February 1930.