
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.

Detective Mulligan
Some Like It Hot

Matt Brown
American Madness

Self (archive footage)
Angels with Dirty Faces: Whaddya Hear? Whaddya Say?

My Mistake

Dan Hammer
Riff-Raff

Delmas
Ragtime

Warden Walter Long
Castle on the Hudson

George Steele
Crack-Up

Jerry Connolly
Angels with Dirty Faces

Ben Lawson
The End

Det. Vincent Ricks
The People Against O'Hara

Hildy Johnson
The Front Page

Francis William 'Frank' / 'Cav' Cavanaugh
The Iron Major

Gramp Fry
The Boy with Green Hair

Knute Rockne
Knute Rockne All American

Jim Brogan
Bombshell

Chick Davis
Bombardier

Pat O’Brien
The Phynx

James 'Jimmy' Regan
Criminal Lawyer

Martin Murphy
His Butler's Sister

Joe Farley
A Dangerous Profession

Martin Martin
Johnny One-Eye

Capt. Stephen Jameson
San Quentin

Sam Gallagher
Secret Command

Detective Butch Saunders
Bureau of Missing Persons

Father Duffy
The Fighting 69th

Captain Oren Hayes
The Over the Hill Gang

John Gorman
The Last Hurrah

"Scrapper" Thornhhill
Flirtation Walk

Biff Martin
Here Comes the Navy

Jake L. Lee
Ceiling Zero

Steve Case
Torrid Zone

James Aloysius 'Jim' / 'Jimmy' O'Malley
The Great O'Malley

Father O'Hara
The Fireball

Dave Logan
China Clipper

Jimmy Doyle
Virtue

Samuel J. 'Sam' Doyle
Flight Lieutenant

Bart Crosbie
Kill Me Tomorrow

Dan McCorn
Broadway

Barney Slaney
Laughter in Hell

Self
James Cagney: That Yankee Doodle Dandy

Duke Talbot
Air Mail

Chief Michael 'Mike' Mallory
The Navy Comes Through

William Jennings 'Billy / 'Square Shooting Murph' Murphy
The Kid from Kokomo

Rush Blake
Twenty Million Sweethearts

John Webb
Slightly Honorable

J. Carlyle 'J.C.' Benson
Boy Meets Girl

Andy Terrell
The World Gone Mad

Sam Bradshaw
The Final Edition

Charlie Lang
Gambling Lady

Ritzy
The Personality Kid

Steve Burke
'Til We Meet Again

Himself (uncredited)
Swingtime in the Movies

Ian 'Hap' O'Connor
Flowing Gold

Roy Chadwick
Cowboy from Brooklyn

Conroy (uncredited)
Honor Among Lovers

Matt Brennan
Destination Unknown

Waddell
Scandal for Sale

Matt Kelly
Hell's House

Frank Deane
The Strange Case of Clara Deane

Sport Wardell
Flying High

Steve Porter
Consolation Marriage

Butch Rogers
Submarine D-1

Coach Gore
College Coach

Michael J. Malone
Having Wonderful Crime

Ernest 'Texas' Conway
Jubilee Trail

Red Blayd
Slim

Lee Laird
Public Enemy's Wife

Frank Wallace
Ring of Fear

Click Wiley
Page Miss Glory

Hallelujah Harry
The Adventures of Nick Carter

Self (archive footage) (uncredited)
Hollywood Out-takes and Rare Footage

John Quinn
Garden of the Moon

Pat O'Hara
The Irish in Us

Narrator
Babe Ruth Story: That Ever Livin' Babe

Dr. William P. Kennicott
I Married a Doctor

Stephen Chase
Oil for the Lamps of China

Maj. Steve Lockhart
Marine Raiders

Al McGillevray
Stars Over Broadway

Larry MacArthur
In Caliente

Thomas "Breezy" Elliott
Off the Record

Michael O'Flaherty 'Speed' McBride
Man Alive

Joe Greer
Indianapolis Speedway

Bill Landin
Women Are Like That

Terry Riley
I've Got Your Number

Mr. Caboose
Scout's Honor

"Spot Cash" Cutler
I Sell Anything

Father Peter J. Dunne
Fighting Father Dunne

Judge Murcott
Town Tamer

Self (archive footage)
Classic Movie Bloopers: Uncensored

Mike Farrough
Escape to Glory

Bill Morgan
Back in Circulation

Pat O'Brien
Out Where the Stars Begin

Sgt. McGll
Welcome Home, Johnny Bristol

Police Detective (uncredited)
Compliments of the Season

Gus Linden
Inside Detroit

Lieut. Brannigan
Devil Dogs of the Air

Peter Shea
Personal Maid

Tim Reardon
Two Yanks in Trinidad

Self
Breakdowns of 1936

Lt. Cmdr. Hale
Okinawa

Patrick Nevil
Perilous Holiday

Self (archive footage) (uncredited)
Breakdowns of 1941

Self
Blow-Ups of 1947

Self/Host
The Voice of Hollywood

Self (archive footage)
You Must Remember This: The Warner Bros. Story

Marty
Crimes Square

Himself (uncredited)
A Trip Thru a Hollywood Studio

Ben Lear
Flaming Gold

Pat O'Brien (archive footage) (uncredited)
Breakdowns of 1938

Self
Things You Never See on the Screen

Himself (uncredited)
A Dream Comes True

Self
Breakdowns of 1937

Self
Breakdowns of 1939

Self
Breakdowns of 1940

Chinese Restaurateur (uncredited)
The Road to Hong Kong

Dan O'Farrell
The Night of Nights

Self
Screen Snapshots (Series 16, No. 1)

President of the Senate
Billy Jack Goes to Washington

Jimmy, the morgue attendant
Kiss Me... Kill Me

Jimmy Reed
Hollywood Speaks

Himself
Screen Snapshots No. 11

Self
I Captured the King of the Leprechauns

Emory
Amanda Fallon

Abner Therman
The Sky's the Limit

Self (archive footage)
Studio Highlights

Self
Dill Scallion

Sheriff Kyle Bickford
Invitation to a Gunfighter
Known For
Acting
Known Credits
128
Gender
Male
Birthday
1899-11-10
Place of Birth
Milwaukee, Wisconsin, USA
Also Known As
William Joseph Patrick O'Brien