• ''His Wife's Visitor'' (1909 short with Mary Pickford) - Harry Wright (credited as William A. Quirk) •
A Sound Sleeper (1909 short) - uncredited •
The Hessian Renegades (1909 short) - Hessian •
Pippa Passes (1909 short) - In Studio •
Nursing a Viper (1909 short) - Fleeing Aristocrat • ''
The Red Man's View'' (1909 short) - Conqueror (uncredited) •
In Little Italy (1909 short) - At the Ball •
To Save Her Soul (1909 short) •
Choosing a Husband (1909 short) - 2nd Bachelor • ''
The Woman from Mellon's'' (1910 short) - Harry Townsend •
The Two Brothers (1910 short) - Mexican •
May and December (1910 short with Mary Pickford) - June •
The Lucky Toothache (1910 short) •
How Rastus Gets His Turkey (1910 short) - Rastus •
Billy in Trouble (1911 short) - Billy • ''The Burglar's Fee'' (1911 short) - The Burglar •
Hearts, Hunger, Happiness (1911 short) - Billy •
Father Against His Will (1911 short) - Harry •
Algie the Miner (1912 short) - Algie Allmore •
Fra Diavolo (1912 short directed by Alice Guy) - Fra Diavolo •
The Equine Spy (1912 short) - colored servant (in blackface) •
The Maverick (1912 short) - Billy Taylor •
The Great Scientist (1912 short) - young chemist •
Billy Gets Arrested (1913 short) - Billy •
Burglarizing Billy (1913 short) - Billy • ''Billy's First Quarrel'' (1913 short) - Billy • ''
Billy's Adventure'' (1913 short) - Billy •
Billy in Armor (1913 short) - Billy •
Animated Weekly, no. 67 (1913) "Who's Who in Pictures: Billy Quirk" •
The Egyptian Mummy (1914) - Dick Graham •
The Arrival of Josie (1914) - Hank • ''Josie's Coney Island Nightmare'' (1914) - Hank • ''Josie's Declaration of Independence'' (1914 short) - Hank •
Romantic Josie (1914 short) - Hank • ''Josie's Legacy'' (1914) - Hank •
Our Fairy Play (1914 short) - Willie Finley •
The Girl from Prosperity (1914 short) - Jim •
What Happened to Father? (1915) - Dawson Hale •
The Flirt (1916 short) - acted and directed. •
Intolerance (1916) - Bartender •
The Matinee Idol (1916 short) •
Excess Baggage (1917 short) - Director with Leatrice Joy. Film later adapted in 1919 as
His Neglected Wife •
Winning an Heiress (1917 short) - Director. •
The Web of Life (1917) - The Valet •
His Day Out (1918 short) •
The Man Worth While (1921) - Napoleon •
At the Stage Door (1921) - Harold Reade •
My Old Kentucky Home (1922) - Loney Smith •
Success (1923) - Nick Walker •
The Glimpses of the Moon (1923) - Bob Fulmer •
Salomy Jane (1923) - Colonel Starbottle •
Broadway Broke (1923) - Joe Karger •
A Bride for a Knight (1923) •
The Dixie Handicap (1924) - A Tout ==Notes==