Léon Walther (2 June 1874 – 2 March 1973) was a French film and stage actor who played on numerous occasions in Sacha Guitry's films and plays.

• 1935: Odette / Déchéance by Jacques Houssin – Count Hubert de Clermont-Latour
• 1937: The Pearls of the Crown by Sacha Guitry and Christian-Jaque – Anne de Montmorency
• 1938: Remontons les Champs-Élysées by Sacha Guitry and Robert Bibal – a lord
• 1939: Nine Bachelors by Sacha Guitry – Le maître d'hôtel
• 1941: Le fabuleux destin de Désirée Clary by Sacha Guitry – Count Morner
• 1941: Madame Sans-Gêne by Roger Richebé – Despréaux
• 1941: Ne bougez plus by Pierre Caron – Le grand chambellan
• 1942: Prince Charming by Jean Boyer – Count Danrémont
• 1942: The Guardian Angel by Jacques de Casembroot – Molignon
• 1942: Une étoile au soleil by André Zwoboda – Adalbert de Merlerault
• 1943: My Last Mistress by Sacha Guitry – the physician
• 1943: La Malibran by Sacha Guitry
• 1943: La vie de plaisir by Albert Valentin – Célestin
• 1945: As Long as I Live by Jacques de Baroncelli
• 1946: Roger la Honte by André Cayatte – the president of the court
• 1946: La femme en rouge by Louis Cuny – Le directeur des beaux-arts
• 1947: Le Comédien by Sacha Guitry – Aubril
• 1948: The Lame Devil by Sacha Guitry – a physician
• 1949: Monseigneur de Roger Richebé – the majordome
• 1949: The Treasure of Cantenac by Sacha Guitry
• 1951: La Poison by Sacha Guitry – the prosecutor
• 1952]: The Call of Destiny by Georges Lacombe – the critic
• 1952: The Virtuous Scoundrel by Sacha Guitry – Maître Denisot, le notaire
• 1953]: The Earrings of Madame de… by Max Ophüls – L'administrateur
• 1953: Royal Affairs in Versailles de Sacha Guitry – Lévêque de Paris
• 1954]: Le Comte de Monte-Cristo by Robert Vernay – film shot in two periods – a courtesan
• 1954: Napoléon by Sacha Guitry
• 1955: If Paris Were Told to Us by Sacha Guitry – the man addressing Beaumarchais

• 1942: N'écoutez pas, mesdames ! by Sacha Guitry, directed by the author, Théâtre de la Madeleine
• 1950: Harvey de Mary Chase, directed by Marcel Achard, Théâtre Antoine
• 1951: Harvey de Mary Chase, directed by Marcel Achard, Théâtre des Célestins
• 1952: N'écoutez pas, mesdames ! by Sacha Guitry, directed by the author, Théâtre des Variétés

• Léon Walther sur Les Archives du spectacle.