
Child & Teen actor Billy O'Brien. Brother of child actor Gene O'Brien.
Child & Teen actor Billy O'Brien. Brother of child actor Gene O'Brien.
Profile photo of older guy with dark hair is NOT Billy O'Brien. His name might be the same, but it is not the correct person. That photo should be deleted.
8/28/1944 Culver City Evening Star News: "Captain William O'Brien Lost in the Pacific" news article states that Captain William S. O'Brien Culver City Ace in the South Pacific theatre of war has been missing in action since August 4th. He has shot down a number of Japanese fighter planes and latest reports indicate that the mission on which he was missing was somewhere in the New Guinea area.
IMDb: https://www.imdb.com/title/nm0639446
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Maid of Salem
Character:Young Jasper (Uncredited)
Release Date:12/02/1937

Human Cargo
Character:Boy
Release Date:15/05/1936

Music in the Air
Character:Perzinger-School Boy (uncredited)
Release Date:13/12/1934

Next Of Kin
Character:Spuds
Release Date:01/06/1934

No Greater Glory
Character:Paul Street Boy
Release Date:30/03/1934

West of the Divide
Character:Spuds
Release Date:15/02/1934

This Side of Heaven
Character:Messenger Boy
Release Date:02/02/1934

The Power and the Glory
Character:Tom as a Boy
Release Date:06/10/1933

Stage Mother
Character:Student
Release Date:29/09/1933

Pilgrimage
Character:
Release Date:12/07/1933

Dangerous Crossroads
Character:Jackie's Friend
Release Date:15/06/1933

The Christmas Party
Character:Party Guest served by Marion Davies
Release Date:17/12/1931

Bouncing Babies
Character:(unconfirmed)
Release Date:11/10/1929

Boxing Gloves
Character:Billy
Release Date:09/09/1929

Say It with Songs
Character:Schoolboy
Release Date:05/08/1929

The Valiant
Character:Boy (uncredited)
Release Date:19/05/1929

Say It with Babies
Character:Child (uncredited)
Release Date:16/05/1926