Jack J. Clark was an American director and actor of the early motion picture industry.
Marian, the Holy Terror
The Poacher's Pardon
Jim - the Poacher
The Little Gluers
Dan O'Hara - the Kerry Gow
Ireland, the Oppressed
Marty
The Railroad Raiders of '62
Confederate Officer (archive footage) (uncredited)
Chandu on the Magic Island
Vitras
Railroad Raiders of '62
Anderson / Confederate officer
Ebb Tide
Tourist
Citizen Kane
Man Singing at Inquirer Party (uncredited)
A Slave to Drink
James Grant
When the Dead Return
Antoine
Come Back to Erin
Jerry, the Blacksmith
For Ireland's Sake
Marty O' Sullivan
The Innocent Lie
Terry O'Brien
The Wives of Jamestown
Bryan O’Sullivan/John Pierce
When Lovers Part
For Love of an Enemy
The Northern Spy
By a Woman's Wit
Captain Jasper
Rory O'More
Rory O'More
The Colleen Bawn
Myles na Copaleen
His Mother
Terence
Captured by Bedouins
Jack Barnett - Doris's Brother
Tragedy of the Desert
Dr. Franklin Cochran
Winning a Widow
Jim White
Love and Learn
Hansen
The Return of Chandu
Vitras
Murder with Pictures
Party Guest (uncredited)
David Harum
Traveler (uncredited)
The Great Secret
Three Cornered Moon
Stage Director (uncredited)
Audrey
John Byrd