| Orth, Elisabeth, | Elisabeth Orth | Actor | 1971 - 1995 | 6 | |
| Osborn, Elmar | Elmar Osborn | Actor | 1955 | 1 | |
| Osborne, Dorithy | Dorithy Osborne | Actor | 1943 | 1 | |
| Osborne, Si | Si Osborne | Actor | 2001 | 2 | |
| Ostermayer, Christine | Christine Ostermayer | Actor | 1965 - 1969 | 2 | |
| Oswald, Axsel | Axsel Oswald | Actor | 1936 - 1937 | 2 | |
| Ott, Günther, | Günther Ott | Actor | 1931 | 1 | |
| Ottavino, John | John Ottavino | Actor | 1997 | 1 | |
| Ottesen, Helle, | Helle Ottesen | Actor | 1975 - 2013 | 7 | |
| Otto, Miranda | Miranda Otto | Actor | 2002 - 2015 | 2 | |
| Otto, Pavel | Pavel Otto | Actor | 1957 | 1 | |
| Outin, Régis | Régis Outin | Actor | 1928 - 1978 | 4 | |
| Overbey, Kellie, | Kellie Overbey | Actor | 1998 | 1 | |
| Owen, Marianne | Marianne Owen | Actor | 1978 - 1996 | 4 | |
| Owings, Sarah, | Sarah Owings | Actor | 1976 | 1 | |
| O'Brien, Eileen | Eileen O'Brien | Actor | 2000 | 8 | |
| O'Neil, Raymond, | Raymond O'Neil | Actor | 2000 | 1 | |
| Oftebro, Nils Ole, | Nils Ole Oftebro | Actor | 1970 - 2018 | 92 | |
| O'Malley, Flynn | Flynn O'Malley | Actor | 1963 | 1 | |
| O'Connor, Terrence | Terrence O'Connor | Actor | 1963 | 1 | |
| Olsen, Kathe B., | Kathe B. Olsen (Kathe B. Olsen) | Actor | 2002 | 1 | |
| Ousdal, Sverre Anker, | Sverre Anker Ousdal | Actor | 1983 - 2020 | 40 | |
| Osterberger, -, | - Osterberger | Actor | 1971 | 2 | |
| Ovčinnikova, O. | O. Ovčinnikova | Actor | 1999 - 2000 | 2 | |
| Oriane, Francoise | Francoise Oriane | Actor | 1984 | 1 | |
| O'Connor, Kaleigh | Kaleigh O'Connor | Actor | 2002 | 1 | |
| O'Connor, Savannah | Savannah O'Connor | Actor | 2002 | 1 | |
| Oppi, Frk., | Frk. Oppi | Actor | 1941 | 1 | |
| O'Neil, Sally | Sally O'Neil | Actor | 1939 | 1 | |
| O'Brien, Peter | Peter O'Brien | Actor | 2002 | 1 | |
| O'Connell Bak, Dennis | Dennis O'Connell Bak | Actor | 2006 | 1 | |
| Ongjerth, Richárd | Richárd Ongjerth | Actor | 1960 | 1 | |
| Oanh, Tú | Tú Oanh | Actor | 2006 - 2010 | 2 | |
| O'Foghludha, Michael | Michael O'Foghludha | Actor | 2001 | 1 | |
| O'Kane, Nancy | Nancy O'Kane | Actor | 1952 - 1961 | 2 | |
| Olesen, Maggie | Maggie Olesen | Actor | 1971 | 1 | |
| O'Callaghan, Brenainn | Brenainn O'Callaghan | Actor | 2000 | 1 | |
| Oitana, Ricky, | Ricky Oitana | Actor | 1996 | 2 | |
| O'Brien, James | James O'Brien | Actor | 1957 - 1971 | 2 | |
| O'Connell, Patricia | Patricia O'Connell | Actor | 1975 - 2000 | 2 | |
| Oosthout, Nelly, | Nelly Oosthout | Actor | 1928 - 1930 | 2 | |
| O'Connell, Carol | Carol O'Connell | Actor | 1963 | 1 | |
|
|
