| Carti, Alfonso | Alfonso Carti | Actor | 1954 - 1956 | 2 | |
| Conde, Antonio Díaz | Antonio Díaz Conde | Composer | 1954 - 1956 | 2 | |
| Colicos, John | John Colicos | Actor | 1954 - 1963 | 2 | |
| Clausen, Frimann, Falck | Frimann Falck Clausen | Actor | 1954 - 1966 | 90 | |
| Candeau, Alberto | Alberto Candeau | Actor | 1954 - 1976 | 3 | |
| Crowden, Graham | Graham Crowden | Actor | 1954 - 1979 | 3 | 1 |
| Constantinescu, Corina | Corina Constantinescu | Actor | 1955 | 1 | |
| Candelier, François | François Candelier | Actor, Director | 1955 | 2 | |
| Childs, Prentiss | Prentiss Childs | Actor | 1955 | 1 | |
| Cunningham, Ethel | Ethel Cunningham | Actor | 1955 | 1 | |
| Cottrell, Thomas | Thomas Cottrell | Actor | 1955 | 1 | |
| Clasen, Hans-Walter | Hans-Walter Clasen | Actor | 1955 | 1 | |
| Cammuccio, Dino | Dino Cammuccio | Actor, Dramaturg | 1955 - 1956 | 6 | |
| Collin, Gunnar | Gunnar Collin | Actor | 1955 - 1960 | 2 | |
| Chilcott, Barbara | Barbara Chilcott | Actor | 1955 - 1961 | 2 | |
| Cauwenberg, Marcel | Marcel Cauwenberg | Actor | 1955 - 1961 | 8 | 1 |
| Chvojková-Pallasová, Dagmar | Dagmar Chvojková-Pallasová | Translator | 1955 - 1962 | 4 | 1 |
| Christie, Robert | Robert Christie | Actor | 1955 - 1963 | 2 | |
| Colt, Alvin | Alvin Colt | Costume Designer | 1955 - 1965 | 3 | |
| Carlqvist, Margit | Margit Carlqvist | Actor | 1955 - 1967 | 4 | 1 |
| Camerlynck, Hector | Hector Camerlynck | Actor | 1955 - 1972 | 2 | |
| Chmelík, Radúz | Radúz Chmelík | Actor | 1955 - 1972 | 2 | 1 |
| Constantinescu, Titi | Titi Constantinescu | Lighting Designer | 1955 - 1973 | 2 | |
| Ceraj-Cerić, Stanislava-Stana | Stanislava-Stana Ceraj-Cerić | Costume Designer | 1955 - 1978 | 2 | |
| Codrescu, Constantin | Constantin Codrescu | Actor | 1955 - 2009 | 8 | |
| Cooper, Charlotte | Charlotte Cooper | Actor | 1956 | 1 | |
| Craig, Miriam | Miriam Craig | Actor | 1956 | 1 | |
| Crosse, Hazel | Hazel Crosse | Actor | 1956 | 1 | |
| Cudmore, Elaine | Elaine Cudmore | Costume Designer | 1956 | 1 | |
| Cox, Peter | Peter Cox | Actor | 1956 | 1 | |
| Chun, Yu | Yu Chun | Actor | 1956 | 1 | 2 |
| Croiset, Max | Max Croiset | Actor | 1956 | 1 | |
| Chila, Lorenzo | Lorenzo Chila | Actor, Costume Designer | 1956 | 2 | |
| Correll, Hector | Hector Correll | Actor | 1956 | 1 | |
| Carlson, Elinor | Elinor Carlson | Actor | 1956 | 1 | |
| Cveticanin, Mihajlo | Mihajlo Cveticanin | Actor | 1956 | 2 | |
| Calließ, Gretel | Gretel Calließ | Actor | 1956 | 1 | |
| Corrigan, Robert, W. | Robert W. Corrigan | Director | 1956 | 1 | 1 |
| Cánepa, María | María Cánepa | Actor | 1956 | 1 | 1 |
| Casillas, Manuel | Manuel Casillas | Actor | 1956 | 1 | |
| Cass, Deborah | Deborah Cass | Actor | 1956 | 2 | |
| Christensen, Dietmar | Dietmar Christensen | Dancer | 1956 | 1 | |
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