Actors beginning with " O ".
| Una O'Connor | 1880 - 1959 |
| Gary Oldman | 1958 |
| Laurence Olivier | 1907 - 1989 |
| Julia Ormond | 1965 |
| Henry Oscar | 1891 - 1969 |
| Milo O'Shea | 1925 |
| Hal Osmond | 1919 - 1959 |
| Peter O'Toole | 1932 |
| Brian Oulton | 1908 - 1992 |
| Bill Owen | 1914 |
| Clive Owen | 1965 |
