Movies (Acting Roles)
Sorted by Release DateSaturday's Lesson
John B. O'Brien was 44 in Saturday's Lesson as 'The Devil'.Movie Released: Sat, Nov 09 1929
Cat, Dog & Co.
John B. O'Brien was 44 in Cat, Dog & Co. as 'Fruit Vendor'.Movie Released: Sat, Sep 14 1929
The Bride's Play
John B. O'Brien was 37 in The Bride's Play as 'Marquis of Muckross'.Movie Released: Sun, Jan 22 1922
A Daughter of the Law
John B. O'Brien was 36 in A Daughter of the Law as 'Jim Garth'.Movie Released: Tue, Nov 01 1921
Why Girls Leave Home
John B. O'Brien was 36 in Why Girls Leave Home as 'Joseph'.Movie Released: Sun, Sep 04 1921
Annabelle Lee
John B. O'Brien was 36 in Annabelle Lee as 'David Martin'.Movie Released: Fri, May 20 1921
The Stealers
John B. O'Brien was 35 in The Stealers as 'Man of Dawn'.Movie Released: Sun, Oct 03 1920
Wings of Pride
John B. O'Brien was 35 in Wings of Pride as 'Kent Ordway'.Movie Released: Sun, Aug 01 1920
Bab's Diary
John B. O'Brien was 32 in Bab's Diary as 'Harold Valentine'.Movie Released: Sun, Oct 07 1917
The Second Mrs. Roebuck
John B. O'Brien was 29 in The Second Mrs. Roebuck Movie Released: Sun, Aug 23 1914
A Western Redemption
John B. O'Brien was 26 in A Western Redemption as 'Steve Wilson'.Movie Released: Sat, Oct 21 1911
Spike Shannon's Last Fight
John B. O'Brien was 26 in Spike Shannon's Last Fight as 'The Opponent'.Movie Released: Sat, Aug 26 1911
The Corporation and the Ranch Girl
John B. O'Brien was 26 in The Corporation and the Ranch Girl Movie Released: Sat, Jul 08 1911
The Infant at Snakeville
John B. O'Brien was 26 in The Infant at Snakeville Movie Released: Sat, Jun 03 1911
The Puncher's New Love
John B. O'Brien was 26 in The Puncher's New Love Movie Released: Sat, May 13 1911
The Indian Maiden's Lesson
John B. O'Brien was 26 in The Indian Maiden's Lesson Movie Released: Sat, Apr 22 1911
Across the Plains
John B. O'Brien was 26 in Across the Plains as 'The Cowboy's Friend'.Movie Released: Tue, Apr 11 1911
The Count and the Cowboys
John B. O'Brien was 26 in The Count and the Cowboys Movie Released: Sat, Jan 07 1911
A Cowboy's Vindication
John B. O'Brien was 25 in A Cowboy's Vindication Movie Released: Sat, Dec 10 1910
Circle C Ranch's Wedding Present
John B. O'Brien was 25 in Circle C Ranch's Wedding Present Movie Released: Sat, Dec 03 1910
Hank and Lank: As Sandwich Men
John B. O'Brien was 25 in Hank and Lank: As Sandwich Men as 'The Cook'.Movie Released: Tue, Nov 22 1910
Pals of the Range
John B. O'Brien was 25 in Pals of the Range as 'Jack Hartley'.Movie Released: Sat, Oct 22 1910
A Flirty Affliction
John B. O'Brien was 25 in A Flirty Affliction as 'Officer O'Rourke'.Movie Released: Wed, Sep 21 1910
The Pony Express Rider
John B. O'Brien was 25 in The Pony Express Rider as 'Pony O'Brien'.Movie Released: Sat, Sep 17 1910
Take Me Out to the Ball Game
John B. O'Brien was 25 in Take Me Out to the Ball Game Movie Released: Wed, Aug 24 1910
The Dumb Half Breed's Defense
John B. O'Brien was 25 in The Dumb Half Breed's Defense Movie Released: Sat, Aug 20 1910
The Count That Counted
John B. O'Brien was 25 in The Count That Counted Movie Released: Wed, Aug 17 1910
Under Western Skies
John B. O'Brien was 25 in Under Western Skies as 'The Bartender'.Movie Released: Sat, Aug 06 1910
The Bad Man's Last Deed
John B. O'Brien was 25 in The Bad Man's Last Deed Movie Released: Sat, Jul 02 1910
The Ranchman's Feud
John B. O'Brien was 25 in The Ranchman's Feud as 'Jack Matthews'.Movie Released: Sat, Jun 11 1910
Away Out West
John B. O'Brien was 25 in Away Out West as 'Second Prospector'.Movie Released: Sat, Jun 04 1910
The Little Doctor of the Foothills
John B. O'Brien was 25 in The Little Doctor of the Foothills Movie Released: Sat, May 21 1910
The Cowpuncher's Ward
John B. O'Brien was 25 in The Cowpuncher's Ward Movie Released: Sat, May 14 1910
The Cowboy's Sweetheart
John B. O'Brien was 25 in The Cowboy's Sweetheart Movie Released: Sat, Apr 23 1910
The Bad Man and the Preacher
John B. O'Brien was 25 in The Bad Man and the Preacher as 'Snake Williams'.Movie Released: Sat, Apr 16 1910
Method in His Madness
John B. O'Brien was 25 in Method in His Madness as 'Man Outside Third Bar'.Movie Released: Wed, Mar 16 1910
The Mexican's Faith
John B. O'Brien was 25 in The Mexican's Faith as 'The Scoundrel'.Movie Released: Sat, Feb 26 1910
The Cowboy and the Squaw
John B. O'Brien was 25 in The Cowboy and the Squaw Movie Released: Sat, Feb 19 1910
The Outlaw's Sacrifice
John B. O'Brien was 25 in The Outlaw's Sacrifice as 'The Rival'.Movie Released: Sat, Jan 29 1910
Won by a Hold-Up
John B. O'Brien was 25 in Won by a Hold-Up as 'Bill's Friend'.Movie Released: Wed, Jan 19 1910
The Heart of a Cowboy
John B. O'Brien was 25 in The Heart of a Cowboy Movie Released: Sat, Dec 25 1909
The Ranchman's Rival
John B. O'Brien was 24 in The Ranchman's Rival as 'Walter Milton'.Movie Released: Sat, Dec 11 1909
TV Shows (Acting Roles)
Sorted by Release DateAges in TV shows are based off the first air date and may not be accurate. View individual episode details for accurate ages