Robert Leffler (9 January 1866 – 15 March 1940) was a German actor, film director and opera singer (bass).^[1]

• The Haunted Castle (1921)
• The Fear of Women (1921)
• Rose of the Asphalt Streets (1922)
• A Dying Nation (1922)
• The Circle of Death (1922)
• The Man of Steel (1922)
• The Expulsion (1923)
• The Secret of Brinkenhof (1923)
• The Comedian's Child (1923)
• Friedrich Schiller (1923)
• Wilhelm Tell (1923)
• Comedy of the Heart (1924)
• By Order of Pompadour (1924)
• Horrido (1924)
• A Free People (1925)
• The Island of Dreams (1925)
• Bismarck (1925)
• Comedians (1925)
• The Blackguard (1925)
• Goetz von Berlichingen of the Iron Hand (1925)
• The Good Reputation (1926)
• Derby (1926)
• The Clever Fox (1926)
• Only a Dancing Girl (1926)
• Watch on the Rhine (1926)
• Two and a Lady (1926)
• The Adventurers (1926)
• Sister Veronika (1927)
• Carnival Magic (1927)
• Bismarck 1862–1898 (1927)
• The Harbour Bride (1927)
• The Old Fritz (1928)
• Roses Bloom on the Moorland (1929)
• Crucified Girl (1929)
• A Mother's Love (1929)
• Elisabeth of Austria (1931)
• Uncle Bräsig (1936)