| Name | Functions | Event Dates  | Events | Resources | ||
|---|---|---|---|---|---|---|
| Ladislav Obuch | Translator | 1955 - 2021 | 14 | 1 | ||
| Helmut Oeser | Actor | 1955 - 2003 | 6 | |||
| Aleksandar Ognjanović | Director | 1955 - 1979 | 4 | |||
| Kirsti Ortola | Actor | 1955 - 1971 | 4 | |||
| Edith Ottosen | Actor | 1955 - 1967 | 4 | |||
| Arne Thomas Olsen | Actor, Director | 1955 - 1963 | 19 | 1 | ||
| Leni Osswald | Costume Designer | 1955 - 1962 | 2 | |||
| Yasushi Ohki | Director | 1955 - 1956 | 2 | |||
| Elmar Osborn | Actor | 1955 | 1 | |||
| Edgar Olt | Actor | 1955 | 3 | |||
| Oscar Ottesen | Lighting Designer | 1954 - 1971 | 4 | |||
| Jens-Anker Olsen | Designer | 1954 - 1956 | 2 | |||
| Åke Ohberg | Actor | 1954 | 1 | |||
| Betty O'Nians | Actor | 1954 | 1 | |||
| Gérard Oury | Actor | 1954 | 1 | |||
| Michel Odekerken | Actor | 1954 | 1 | |||
| Erna Ophaug | Sound Designer | 1953 - 2006 | 4 | |||
| Heinz Ockermüller | Designer | 1953 | 1 | |||
| Shiro Okakura | Director | 1953 | 1 | |||
| Yoshio Ohmori | Actor | 1953 | 1 | |||
| Fumio Ohmachi | Actor | 1953 | 1 | |||
| Thomas Arne Olsen | Actor | 1953 | 1 | |||
| Kerstin Olin | Actor | 1953 | 2 | |||
| Ary Oechslin | Costume Designer, Designer | 1952 - 1978 | 11 | 1 | ||
| Nancy O'Kane | Actor | 1952 - 1961 | 2 | |||
| Joseph Offenbach | Actor | 1952 | 1 | |||
| Karl Ostertag | Actor | 1952 | 1 | |||
| Maria Ott | Actor | 1952 | 1 | |||
| Lujo Obendorf | Costume Designer | 1952 | 1 | |||
| Sono Osato | Actor | 1951 | 1 | |||
| Shelagh O'Hanlon | Actor | 1951 | 1 | |||
| Evangeline Olson | Actor | 1951 | 1 | |||
| Millicent Oldham | Actor | 1951 | 1 | |||
| Dolores Owings | Actor | 1951 | 1 | |||
| Otto Osthoff | Actor | 1951 | 1 | |||
| Justus Ott | Actor | 1951 | 1 | |||
| Elizabeth Orion | Actor | 1951 | 1 | |||
| Gordon Oasheim | Actor | 1951 | 1 | |||
| Andrew Osborn | Actor | 1951 | 1 | |||
| Per Oscarsson | Actor | 1950 - 1997 | 4 | |||
| Fritz Olmesdahl | Actor | 1950 | 1 | |||
| - Owen-Maclean | Costume Designer | 1950 | 1 | |||