It Happened in Leicester Square is a 1949 British film, written and directed by Geoffrey Benstead. The film stars Harry Tate Jr and Slim Allen as two men from Yorkshire who visit a billiard hall and music hall in London.^[1]

The original version was 53 minutes long and was given a "U" Certificate, indicating that it was suitable for children, on 22 March 1949.^[2] The film was a commercial failure, and a re-edited version, some five minutes shorter, was released in 1951 as Hello London.^[3]

The film featured appearances from a number of snooker and English billiards players: Joe Davis, Sidney Smith, Thelma Carpenter, Joyce Gardner, Con Stanbury, Herbert Holt and Jackie Rea.^[1] David Quinlan described the film as a "Mercifully brief programme-filler."^[4] It was dismissed as "a dull procession of variety acts" by Steve Chibnall and Brian McFarlane in their book The British 'B' Film.^[3]