As of June 2026, Pat O'Brien is best known for The Tonight Show Starring Johnny Carson and What's My Line?. Find every show and movie Pat O'Brien has starred in — and where to watch them — below.
Pat O'Brien

Pat O'Brien

Actor Born 1899 Milwaukee, Wisconsin, USA 12 TV Shows 8 Movies

Pat O'Brien (born William Joseph Patrick O'Brien) was an American stage, screen, radio, and television actor. He was a star during the first several years of his film career, the height of his popularity being during the 1930s and 1940s.

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📺 Pat O'Brien's TV Shows

The Tonight Show Starring Johnny Carson
Self
1962
What's My Line?
Self
1950
Climax!
Police Lieutenant Moore
1954
Climax!
Police Lieutenant
1954
Climax!
Ed Talbot
1954
The Virginian
J. Jimerson Jones
1962
The Virginian
Doc Bigelow
1962
Happy Days
1974
Studio One
Mike Waterson
1948
The Ed Sullivan Show
Self
1948
The Colgate Comedy Hour
Self
1950
McCloud
1970

🎬 Pat O'Brien's Movies

Some Like It Hot
Detective Mulligan
1959
Ragtime
Delmas
1981
The End
Ben Lawson
1978
Flirtation Walk
"Scrapper" Thornhhill
1934
Angels with Dirty Faces
Jerry Connolly
1938
Crack-Up
George Steele
1946
The Fighting 69th
Father Duffy
1940
American Madness
Matt Brown
1932

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