| O'Brien | Jesse DeVorska | PAIN IN THE PULLMAN, A (1936) |
| O'Brien's secretary | Dorothy Appleby | WHAT'S THE MATADOR? (1942) |
| O'Brien, 1st guard | Ernie Stanton | HIT THE ROAD (1941) |
| O'Leary | Cecil Kellaway | APPOINTMENT FOR LOVE (1941) |
| Oboist | Sherry Hall | HERE COMES THE BAND (1935) |
| Off-Beat Davis | Allen Jenkins | TIME OUT FOR RHYTHM (1941) |
| Office | Unidentified TIME OUT FOR RHYTHM 5 | TIME OUT FOR RHYTHM (1941) |
| Office boy | Richard Craneq | IN THE NAVY (1941) |
| Office boy | Jack Dimond | HEADLINE HUNTERS (1955) |
| Office clerk | Joan Banks | LET'S MAKE LOVE (1960) |
| Office girl | Unidentified SERVES YOU RIGHT 1 | SERVES YOU RIGHT (1935) |
| Office secretary | Virginia Engels | IN THE NAVY (1941) |
| Office worker | Eddie Hall | MEET THE CHUMP (1941) |
| Office worker | Mary Lord | SAILOR TAKES A WIFE, THE (1945) |
| Officer | Unidentified SALT WATER DAFFY 1 | SALT WATER DAFFY (1933) |
| Officer | James Sheridan | OPERATOR 13 (1934) |
| Officer | Sherry Hall | WINNING TICKET, THE (1935) |
| Officer | Bernard Carr | MURDER IN THE FLEET (1935) |
| Officer | Joseph Young | MURDER IN THE FLEET (1935) |
| Officer | Ethan Laidlaw | HALF SHOT SHOOTERS (1936) |
| Officer | John Tyrrell | THREE LITTLE SEW AND SEWS (1939) |
| Officer | Crane Whitley | ARABIAN NIGHTS (1942) |
| Officer | Carlos Alvarado | ARABIAN NIGHTS (1942) |
| Officer | Jamiel Hasson | ARABIAN NIGHTS (1942) |
| Officer | Edgar Dearing | GENTLEMAN MISBEHAVES, THE (1946) |
| Officer | William Haade | GENTLEMAN MISBEHAVES, THE (1946) |
| Officer | Lew Brown | WHICH WAY TO THE FRONT? (1970) |
| Officer at ceremony | Jack Gargan | PITTSBURGH (1942) |
| Officer Casey | Chick Collins | LISTEN, JUDGE (1952) |
| Officer Dennis Devlin | Dick Foran | BUTCH MINDS THE BABY (1942) |
| Officer disciplining guard | Lee Phelps | MURDER IN THE FLEET (1935) |
| Officer Griswold | Ralph Dunn | MY SISTER EILEEN (1942) |
| Officer handcuffed to Louie | Charlie Phillips | SO LONG MR. CHUMPS (1941) |
| Officer in charge of Louie | Stanley Brown | SO LONG MR. CHUMPS (1941) |
| Officer Jackson | Walter Sande | MY SISTER EILEEN (1942) |
| Officer Jackson | Cy Schindell | SHIVERING SHERLOCKS (1948) |
| Officer Jackson | Cy Schindell | OF CASH AND HASH (1955) |
| Officer Joe Bolton | Joe Bolton | STOP! LOOK! AND LAUGH! (1960) |
| Officer Joelson | Peter Leeds | WITH SIX YOU GET EGGROLL (1968) |
| Officer Kelly | Bud Jamison | A PLUMBING WE WILL GO (1940) |
| Officer Lonigan | Donald MacBride | MY SISTER EILEEN (1942) |
| Officer Muldoon | Ed Gargan | MEET THE CHUMP (1941) |
| Officer Murphy | Unidentified MUTTS TO YOU 4 | MUTTS TO YOU (1938) |
| Officer Murphy | Ed Gargan | MY SISTER EILEEN (1942) |
| Officer O'Connor | Frank O'Connor | SWING PARADE OF 1946 (1946) |
| Officer O'Halloran | Bud Jamison | MUTTS TO YOU (1938) |
| Officer O'Toole | Jack C. Smith | PITTSBURGH (1942) |
| Officer of the Deck | Unidentified MURDER IN THE FLEET 5 | MURDER IN THE FLEET (1935) |
| Officer Reilly | Wade Boteler | IT AIN'T HAY (1943) |
| Officer Ryan | Gil Perkins | LISTEN, JUDGE (1952) |
| Officer Simmy | Robert Karnes | IT'S A MAD, MAD, MAD, MAD WORLD (1963) |
| Officers | Unidentified THE CAPTAIN HATES THE SEA 5 | CAPTAIN HATES THE SEA, THE (1934) |
| Officers | Unidentified MURDER IN THE FLEET 8 | MURDER IN THE FLEET (1935) |
| Official | George Eldredge | GENTLEMAN MISBEHAVES, THE (1946) |
| Official guide | Adrian Rosley | MAD HOLIDAY (1936) |
| Og Oggilby | Grady Sutton | BANK DICK, THE (1940) |
| Ogala | Frank Lackteen | MOONLIGHT AND CACTUS (1944) |
| Ogg | George N. Neise | THREE STOOGES IN ORBIT, THE (1962) |
| OGOK announcer | Peter Lind Hayes | MYRT AND MARGE (1933) |
| Okay | Shemp Howard | TIGHT SHOES (1941) |
| Olaf | Mike Mazurki | THANK YOUR LUCKY STARS (1943) |
| Old King Cole | Vernon Dent | FIDDLERS THREE (1948) |
| Old lady | Margaret Mann | FUGITIVE LOVERS (1934) |
| Old maid | Nora Cecil | WOMAN WANTED (1935) |
| Old maid | Sarah Edwards | IT'S IN THE AIR (1935) |
| Old maid | Patsy O'Byrne | IN THE NAVY (1941) |
| Old man | Nigel DeBrulier | SAN FRANCISCO (1936) |
| Old man | Dal McKennon | SILENT CALL, THE (1961) |
| Old man | Patrick Dennis-Leigh | DOCTOR DEATH: SEEKER OF SOULS (1973) |
| Old man in hospital | Tom Ricketts | SING, BABY, SING (1936) |
| Old woman | Eva Puig | ARABIAN NIGHTS (1942) |
| Old woman in car | Margaret Seddon | BANK DICK, THE (1940) |
| Older woman at mod party | Maxine Semon | SAVAGE INTRUDER (1969) |
| Oldtimer | Lon Bradshaw | BLAZING STEWARDESSES (1975) |
| Ole Margarine | Matt Willis | MR. NOISY (1946) |
| Ole's girlfriend | Doris Houck | MR. NOISY (1946) |
| Olga | Angela Stevens | AIM, FIRE, SCOOT (1952) |
| Olga Fefferkraut | Angela Stevens | ARMY DAZE (1956) |
| Oliver | Oliver Hardy | HOLLYWOOD PARTY (1934) |
| Oliver | David Bruce | HOW'S ABOUT IT? (1943) |
| Oliver | Wheeler Oakman | 3 OF A KIND (1944) |
| Oliver Burton | David Burns | LET'S MAKE LOVE (1960) |
| Oliver Thorsen / 'Two Gun Kelly' | Al Ferguson | BEHIND PRISON GATES (1939) |
| Oliver Yates | Jess Barker | GOOD LUCK, MR. YATES (1943) |
| Ollie Shaw | Jack Rice | BLONDIE KNOWS BEST (1946) |
| Ollie Watts | Harry Stockwell | HERE COMES THE BAND (1935) |
| Omar | Richard Greene | DESERT HAWK, THE (1950) |
| Omay | Jean De Briac | TASSELS IN THE AIR (1938) |
| One of The Three Julians | Jerry Howard | FUGITIVE LOVERS (1934) |
| One of The Three Julians | Larry Fine | FUGITIVE LOVERS (1934) |
| One of The Three Julians | Moe Howard | FUGITIVE LOVERS (1934) |
| One-armed man | Horace McMahon | SERVES YOU RIGHT (1935) |
| One-eyed Arab | Frank Lackteen | DESERT HAWK, THE (1950) |
| Onlooker at premiere | Helen Dickson | HOLLYWOOD HOTEL (1938) |
| Onlooker at premiere | Betty Farrington | HOLLYWOOD HOTEL (1938) |
| Onlooker pummeled by Mrs. Marcus | Harvey Parry | IT'S A MAD, MAD, MAD, MAD WORLD (1963) |
| Onlookers | Unidentified HOLLYWOOD PARTY 7 | HOLLYWOOD PARTY (1934) |
| Opening day radio announcer | Sherry Hall | DEATH ON THE DIAMOND (1934) |
| Opening narration | Jeff Chandler | DESERT HAWK, THE (1950) |
| Opera attendee | Maude Allen | SAN FRANCISCO (1936) |
| Opera singer | Anthony Marlowe | FLAME OF NEW ORLEANS, THE (1941) |
| Opera singer | Gitta Alpar | FLAME OF NEW ORLEANS, THE (1941) |
| Operator | Ernie Adams | OPERATOR 13 (1934) |
| Operator 12 / Lt. Duck | Larry Fine | UNCIVIL WARRIORS (1935) |
| Operator 14 / Capt. Dodge | Moe Howard | UNCIVIL WARRIORS (1935) |
| Operator 15 / Maj. Hyde | Jerry Howard | UNCIVIL WARRIORS (1935) |
| Operator 18 | Lia Lance | OPERATOR 13 (1934) |
| Operator 55 | Walter Long | OPERATOR 13 (1934) |
| Orangutan Gargantua | Charles Gemora | AFRICA SCREAMS (1949) |
| Orchestra | Unidentified BEER AND PRETZELS 3 | BEER AND PRETZELS (1933) |
| Orchestra | Gus Arnheim and His Orchestra | PLANE NUTS (1933) |
| Orchestra | Unidentified TERMITES OF 1938 4 | TERMITES OF 1938 (1938) |
| Orchestra | Eddie Durant and His Rhumba Orchestra | TIME OUT FOR RHYTHM (1941) |
| Orchestra | Glen Gray and His Casa Loma Orchestra | TIME OUT FOR RHYTHM (1941) |
| Orchestra conductor | Gus Schilling | HELLZAPOPPIN' (1941) |
| Orchestra leader | Sam Ash | SAN FRANCISCO (1936) |
| Orchestra leader | Humberto Herrera | TOO MANY BLONDES (1941) |
| Orchestra musician | Jerry Howard | CAPTAIN HATES THE SEA, THE (1934) |
| Orchestra musician | Moe Howard | CAPTAIN HATES THE SEA, THE (1934) |
| Orchid Room guest with missing coat | John Sheehan | HOLLYWOOD HOTEL (1938) |
| Orchid Room hat check girl | Carole Landis | HOLLYWOOD HOTEL (1938) |
| Orchid Room headwaiter | Joseph Romantini | HOLLYWOOD HOTEL (1938) |
| Orchid Room waiter | Jerry Mandy | HOLLYWOOD HOTEL (1938) |
| Orderlies | Unidentified MURDER IN THE FLEET 9 | MURDER IN THE FLEET (1935) |
| Orderly | Bud Geary | STAGE MOTHER (1933) |
| Orderly | Lew Davis | UNCIVIL WARRIORS (1935) |
| Orderly | Carlyle Moore Jr. | MURDER IN THE FLEET (1935) |
| Orderly | Al Thompson | FROM NURSE TO WORSE (1940) |
| Orderly | Dudley Dickerson | FROM NURSE TO WORSE (1940) |
| Orderly | Johnny Kascier | SCRAMBLED BRAINS (1951) |
| Orderly | Carmela Maniscalco | STOOGEMANIA (1986) |
| Orderly in corridor | Charles Dorety | DIZZY DOCTORS (1937) |
| Orderly in corridor | William J. O'Brien | DIZZY DOCTORS (1937) |
| Orderly in corridor | Johnny Kascier | DIZZY DOCTORS (1937) |
| Organ grinder | Unidentified MY SISTER EILEEN 6 | MY SISTER EILEEN (1942) |
| Oriental crewman | Sam Labrador | MURDER IN THE FLEET (1935) |
| Orlando's | Unidentified 4 FOR TEXAS 8 | 4 FOR TEXAS (1963) |
| Orlando's 2nd bartender | Sol Gorss | 4 FOR TEXAS (1963) |
| Orlando's bartender | Ralph Volkie | 4 FOR TEXAS (1963) |
| Orlando's customer | Victor Romito | 4 FOR TEXAS (1963) |
| Orlando's customer | Brandon Beach | 4 FOR TEXAS (1963) |
| Orlando's customer | Ernesto Molinari | 4 FOR TEXAS (1963) |
| Orlando's customer | Eddie Ness | 4 FOR TEXAS (1963) |
| Orlando's customer | George Holmes | 4 FOR TEXAS (1963) |
| Orlando's customer | Matty Jordan | 4 FOR TEXAS (1963) |
| Orlando's customer | Bobby Gilbert | 4 FOR TEXAS (1963) |
| Orlando's doorman | Chester Jones | 4 FOR TEXAS (1963) |
| Orlando's employee | Ray Pourchot | 4 FOR TEXAS (1963) |
| Orlando's waiter | Calvin Brown | 4 FOR TEXAS (1963) |
| Orlando's waiter | Daniel Elam | 4 FOR TEXAS (1963) |
| Orlando's waiter | Wesley Gale | 4 FOR TEXAS (1963) |
| Orlando's waiter | Napoleon Whiting | 4 FOR TEXAS (1963) |
| Ormsby Jamison | Rudy Vallee | PEOPLE ARE FUNNY (1946) |
| Orphanage nurse | Kathrin Clare Ward | BOMBSHELL (1933) |
| Orphans | Unidentified 4 FOR TEXAS 2 | 4 FOR TEXAS (1963) |
| Orville | James Dime | ROAD SHOW (1941) |
| Oscar | Tony Hughes | HOWD' YA LIKE THAT? (1934) |
| Oscar Bush | Shemp Howard | HOLLYWOOD ROUND-UP (1937) |
| Oscar, washroom attendant | Sam McDaniel | WOMAN WANTED (1935) |
| Oswald Carroll, sneezer | Billy Gilbert | HERE COMES THE BAND (1935) |
| Other cast | John Johnson | DISORDER IN THE COURT: 60th ANNIVERSARY TRIBUTE (1990) |
| Other cast | Sandra Moiseeff | DISORDER IN THE COURT: 60th ANNIVERSARY TRIBUTE (1990) |
| Other cast | Paul Relyea | DISORDER IN THE COURT: 60th ANNIVERSARY TRIBUTE (1990) |
| Other cast | Tom Forrester | DISORDER IN THE COURT: 60th ANNIVERSARY TRIBUTE (1990) |
| Other cast | Lisa Smith | DISORDER IN THE COURT: 60th ANNIVERSARY TRIBUTE (1990) |
| Other cast | Ira Lawson | DISORDER IN THE COURT: 60th ANNIVERSARY TRIBUTE (1990) |
| Other cast | Debbie Diamond | DISORDER IN THE COURT: 60th ANNIVERSARY TRIBUTE (1990) |
| Other cast | Eddie Leroy | DISORDER IN THE COURT: 60th ANNIVERSARY TRIBUTE (1990) |
| Other cast | Peter Gust | DISORDER IN THE COURT: 60th ANNIVERSARY TRIBUTE (1990) |
| Other townspeople | Unidentified THE BANK DICK 10 | BANK DICK, THE (1940) |
| Otis | Bill Wolfe | BANK DICK, THE (1940) |
| Otis Abernathy | Emil Sitka | OUTLAWS IS COMING, THE (1965) |
| Otis Piper | Will Wright | ONE EXCITING WEEK (1946) |
| Otto | Murray Alper | SAY ONE FOR ME (1959) |
| Otto Klink, talent scout | Emil Sitka | PARDON MY CLUTCH (1948) |
| Otto Meyer | Phil Silvers | IT'S A MAD, MAD, MAD, MAD WORLD (1963) |
| Otto Schmidt | Charles Winninger | SOUP TO NUTS (1930) |
| Owney | Owen Martin | DAREDEVIL O'DARE (1934) |
| Ox | Paul Guilfoyle | MILLIONAIRES IN PRISON (1940) |
| Oyster Bed Cafe waiter | Shemp Howard | FLAME OF NEW ORLEANS, THE (1941) |
| Oyster Bed Cafe waiter | Frank Sully | FLAME OF NEW ORLEANS, THE (1941) |
| Ozzie Nelson | Ozzie Nelson | STRICTLY IN THE GROOVE (1942) |
| O'Toole neighbor | Leigh DeLacey | LOVE IS A HEADACHE (1938) |
