Leo Genn (9 Augustus 1905 – 26 Januarie 1978) was 'n Engelse akteur. Hy was bekend vir sy rolle in die rolprente Quo Vadis (1951), Moby Dick (1956), The Longest Day (1962), en Ten Little Indians (1965).
- 1940: Ten Days in Paris
- 1944: Tunisian Victory
- 1944: The Return of the Vikings
- 1944: Attack! Battle of New Britain
- 1946: Green for Danger
- 1946: Theirs Is the Glory
- 1948: The Snake Pit
- 1948: The Velvet Touch
- 1950: The Miniver Story
- 1950: The Wooden Horse
- 1950: No Place for Jennifer
- 1951: Quo Vadis
- 1951: The Changing Face of Europe
- 1952: Affair in Monte Carlo
- 1952: Plymouth Adventure
- 1953: The Girls of Pleasure Island
- 1953: Paratrooper
- 1953: Personal Affair
- 1953: Elizabeth Is Queen
- 1954: The Green Scarf
- 1955: Lady Chatterley's Lover
- 1955: The Lowest Crime
- 1956: Moby Dick
- 1956: Beyond Mombasa
- 1957: The Steel Bayonet
- 1958: I Accuse!
- 1958: Tank Force
- 1960: Escape by Night
- 1960: Playgirl After Dark
- 1961: Life of Adolf Hitler
- 1962: The Longest Day
- 1964: The Delhi Way
- 1965: Ten Little Indians
- 1966: Psycho-Circus
- 1970: The Bloody Judge
- 1973: Escape to Nowhere
- 1975: Sie sind frei, Doktor Korczak
- 1960: On Trial
- 1971: The Persuaders!
- 1972: The Movie Quiz
- 1960: Mrs. Miniver
- 1960: Pathfinder
- 1961: On Trial: The Dilke Case
- 1962: Act of Faith
- 1968: The Strange Case of Dr. Jekyll and Mr. Hyde
- 1970: Marie Stopes: Sexual Revolutionary
- 2007: Bloody Jess