
Acting
Australian born William H. O'Brien began his screen acting career in Australia in 1918, then resumed in Hollywood in 1921. He continued acting in films and television series to 1971.

Bedknobs and Broomsticks
as Portobello Road Passerby (uncredited)

Support Your Local Gunfighter
as Old Chess Player (uncredited)

The Todd Killings
as Mr. Miller (uncredited)

Airport
as Waiter at Men's Club

Rio Lobo
as Man in Army Post Saloon (uncredited)

Topaz
as Butler (uncredited)

The Comic
as Funeral Guest (uncredited)

The Trouble with Girls
as Hotel Lobby Extra (uncredited)

The Graduate
as Hotel Guest (uncredited)

Valley of the Dolls
as Bartender (uncredited)

Get Smart
as Scientist (uncredited) · 1 ep.

Laredo
as Townsman (uncredited) · 1 ep.

Bewitched
as Waiter (uncredited) · 1 ep.

The Man from U.N.C.L.E.
as Butler (uncredited) · 1 ep.

Dr. Kildare
as Patient (uncredited) · 1 ep.

Outlaws
as Waiter (uncredited) · 1 ep.

Bonanza
as Delegate (uncredited) · 1 ep.

The Twilight Zone
as Audience Member (uncredited) · 1 ep.

Rawhide
as Waiter (uncredited) · 1 ep.

Wanted: Dead or Alive
as Waiter (uncredited) · 1 ep.
The Graduate
1967