
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.

Some Like It Hot
1959 · as Detective Mulligan

Amanda Fallon
1973 · as Emory

In Caliente
1935 · as Larry MacArthur

Slim
1937 · as Red Blayd

Angels with Dirty Faces
1938 · as Jerry Connolly

Ragtime
1981 · as Delmas

The Last Hurrah
1958 · as John Gorman

Gambling Lady
1934 · as Charlie Lang

Riff-Raff
1947 · as Dan Hammer

Okinawa
1952 · as Lt. Cmdr. Hale

Dill Scallion
1999 · as Self

Town Tamer
1965 · as Judge Murcott

The End
1978 · as Ben Lawson

The Road to Hong Kong
1962 · as Chinese Restaurateur (uncredited)

The Boy with Green Hair
1948 · as Gramp Fry

Knute Rockne All American
1940 · as Knute Rockne

The First 100 Years: A Celebration of American Movies
1995 · as Self (archive footage)

Flying High
1931 · as Sport Wardell