Scénariste

• 1917 - His Final Blowout

Acteur

• 1914 - Tillie's Punctured Romance = Marie's Millions = For the Love of Tillie
• 1914 - Tillie's Punctured Romance
• 1915 - A Modern Enoch Arden
• 1915 - Fatty and the Broadway Stars
• 1915 - The Hunt
• 1916 - Sunshine
• 1916 - Hearts and Sparks
• 1916 - A Bath House Blunder
• 1916 - His Bread and Butter
• 1916 - A Dash of Courage
• 1925 - The Fighting Heart
• 1926 - The Boob
• 1927 - Paid to Love
• 1928 - Spite Marriage
• 1928 - Fazil
• 1929 - The Donovan Affair
• 1930 - City Lights
• 1930 - Scarface, the Shame of a Nation
• 1932 - Million Dollar Legs
• 1933 - Smoky
• 1934 - The Devil Is a Woman
• 1934 - Modern Times
• 1935 - Barbary Coast
• 1937 - Danger - Love at Work
• 1939 - Mr. Smith Goes to Washington
• 1939 - The Great Dictator
• 1941 - Yankee Doodle Dandy
• 1941 - Blues in the Night
• 1941 - One Foot in Heaven
• 1941 - Arsenic and Old Lace
• 1942 - Thank Your Lucky Stars
• 1942 - George Washington Slept Here
• 1942 - The Hard Way
• 1949 - When Willie Comes Marching Home
• 1950 - Flaming Feather
• 1951 - Journey Into Light
• 1951 - The Stooge
• 1951 - Son of Paleface
• 1952 - The Caddy
• 1953 - Living It up
• 1953 - Prince Valiant
• 1954 - Abbott and Costello Meet the Mummy
• 1954 - Abbott and Costello Meet the Keystone Kops
• 1954 - Brigadoon
• 1955 - Pardners
• 1955 - How to Be Very, Very Popular
• 1956 - The Delicate Delinquent
• 1956 - Crime of Passion
• 1957 - Rock-a-Bye Baby
• 1958 - The Last Train from Gun Hill
• 1958 - Don't Give up the Ship
• 1958 - The Last Hurrah
• 1959 - Inherit the Wind
• 1959 - A Private's Affair