Leo John Genn (9 August 1905 – 26 January 1978) was an English actor and barrister. Signified by his relaxed charm and smooth, "black velvet" voice, he had a lengthy career in theatre, film, television, and radio; often playing aristocratic or gentlemanly, sophisticate roles. Born to a Jewish family in London, Genn was educated as a lawyer and was a practicing barrister until after World War II, in which he served in the Royal Artillery as a Lieutenant-Colonel. He began his acting career at The Old Vic and made his film debut in 1935, starring in a total of 85 screen roles until his death in 1978. For his portrayal of Petronius in the 1951 Hollywood epic Quo Vadis, he received an Oscar nomination for Best Supporting Actor. Description above from the Wikipedia article Leo Genn, licensed under CC-BY-SA, full list of contributors on Wikipedia.​

Filmography

• 1975You Are Free, Dr. Korczak — Dr. Janusz Korczak
• 1974Frightmare — Dr. Lytell
• 1973The MacKintosh Man — Rollins (uncredited)
• 1973The Silent One — Chief of M.I.5
• 1972Endless Night — Psychiatrist (uncredited)
• 1971A Lizard in a Woman's Skin — Edmond Brighton
• 1971Die Screaming Marianne — The Judge
• The Persuaders! — Sir Hugo Chalmers
• 1970Connecting Rooms — Dr. Norman
• 1970Marie Stopes: Sexual Revolutionary — Patrick Hastings, KC
• 1970The Bloody Judge — Lord Wessex
• The Expert — Dr. Bellman
• 1968The Strange Case of Dr. Jekyll and Mr. Hyde — Dr. Lanyon
• 1966Circus of Fear — Elliott
• 1966Khartoum — Narrator (voice)
• BBC Play of the Month — Henry Wilcox
• 1965Ten Little Indians — General Mandrake
• 1964The Death Ray of Dr. Mabuse — Adm. Quency
• 1964The Delhi Way — Narrator (voice)
• The Wednesday Play — Hereward Daintry
• 196355 Days at Peking — Gen. Jung-Lu
• Bob Hope Presents the Chrysler Theatre
• 1962The Longest Day — Brig. Gen. Edwin P. Parker Jr.
• The Virginian — Gavin Heath
• The Defenders — Dr. Morton Chaney
• 1961The Life of Adolf Hitler — Narrator
• 1960Escape by Night — British Major Michael Pemberton
• 1960Mrs. Miniver — Clem Miniver
• On Trial — Sir Charles Dilke
• 1960Too Hot to Handle — Johnny Solo
• 1959You'll Never See Me Again — Inspector Stillman
• 1958I Accuse! — Maj. Picquart
• 1958Tank Force! — Sgt. Kendall
• 1958The Immortal Land
• 1958The Steel Bayonet — Maj. Gerrard
• Armchair Theatre — Inspector Stillman
• 1956Beyond Mombasa — Ralph Hoyt
• 1956Moby Dick — Starbuck
• 1955Blackmail — Lionel Kendall
• 1955Lady Chatterley's Lover — Sir Clifford Chatterley
• Screen Director's Playhouse — Paul Bernard
• 1955The Titanic Incident — Paul Bernard
• 1954The Green Scarf — Rodelec
• 1953Elizabeth Is Queen — Narrator
• 1953Personal Affair — Stephen Barlow
• 1953The Girls of Pleasure Island — Roger Halyard
• 1953The Red Beret — Major J. Snow
• 195224 Hours of a Woman's Life — Robert Sterling
• 1952Plymouth Adventure — William Bradford
• 1952The Magic Box — Maida Vale Doctor
• Hallmark Hall of Fame — Archbishop of Rheims
• 1951Power for All — Narrator
• 1951Quo Vadis — Petronius
• 1950I Went Back — Narrator
• 1950No Place for Jennifer — William Parry
• 1950The Miniver Story — Steve Brunswick
• 1950The Undefeated — Joe Anderson (voice)
• 1950The Wooden Horse — Peter Howard
• Your Show of Shows
• 1948London Belongs to Me — Narrator (uncredited)
• 1948The Snake Pit — Mark Kik
• 1948The Velvet Touch — Michael Morrell
• 1947Mourning Becomes Electra — Adam Brant
• 1946Green for Danger — Mr. Eden
• 1946Theirs Is the Glory — Narrator (uncredited)
• 1945Caesar and Cleopatra — Bel Affris
• 1945Famous Scenes from Shakespeare No. I: Julius Caesar - The Forum Scene - Act III. Scene 2 — Marcus Antonius
• 1944Attack! The Battle for New Britain — Narrator (voice)
• 1944Henry V — The Constable of France
• 1944The Return of the Vikings — Narrator (voice)
• 1944The Way Ahead — Captain Edwards
• 1944Tunisian Victory — Narrator (voice)
• 1943The Bells Go Down — Off-Screen Narrator (uncredited)
• 1942The Young Mr. Pitt — Danton (uncredited)
• 1940Contraband — First Brother Grimm
• 1940French Communique — Commentator
• 1940Girl in the News — Prosecuting Counsel (Uncredited)
• 1940Law and Disorder — Another Agent
• 1940Ten Days in Paris — Lanson
• 1938Dangerous Medicine — Murdoch
• 1938Kate Plus Ten — Dr. Gurdon
• 1938Pygmalion — Prince (uncredited)
• 1938The Drum — Abdul Fakir (uncredited)
• 1937Jump for Glory — Prosecuting Counsel
• 1937The Rat — Defending Counsel
• 1936Accused — Man
• 1936The Dream Doctor — Husband

Appearances as themselves (5)

• The World of Hammer — Self (archive footage)
• The Merv Griffin Show — Self
• Tonight Starring Jack Paar — Self
• 1954Tonight in Britain — Self - Commentator
• 1951The Changing Face of Europe — Self-Narrator