| Ioannidou, Zizi | Zizi Ioannidou | Actor | 1989 | 2 | |
| Imai, Mayu | Mayu Imai | Actor | 1991 | 1 | |
| Illian, Dan | Dan Illian | Actor | 1993 | 6 | |
| Irbil, Clement | Clement Irbil | Lighting Designer | 2014 - 2023 | 4 | |
| Ieviņa, Ināra | Ināra Ieviņa | Actor | 1982 | 1 | |
| Inescort, Irene | Irene Inescort | Actor | 1973 - 1982 | 2 | |
| Istatkova, Edi | Edi Istatkova | Actor | 1982 | 1 | |
| Ismagilov, Damir | Damir Ismagilov (Дамир Исмагилов) | Lighting Designer | 2013 | 1 | |
| Isobe, Tsutomu | Tsutomu Isobe | Actor | 1994 | 1 | |
| Iwasaki, Kazuo | Kazuo Iwasaki | Lighting Designer | 1980 | 1 | |
| Iwersen, Rainer | Rainer Iwersen | Director | 1980 | 1 | |
| Irving, George | George Irving | Actor | 1980 - 2009 | 2 | |
| Ito, Asami | Asami Ito | Actor | 1994 | 1 | |
| Ishigami, Tamotsu | Tamotsu Ishigami | Sound Designer | 1994 | 1 | |
| Ishibashi, Kenji | Kenji Ishibashi | Actor | 1980 | 1 | |
| Ikemura, Yasuko | Yasuko Ikemura | Director, Translator | 1980 | 2 | |
| Ipsen, Henrik | Henrik Ipsen | Actor | 1997 | 1 | |
| Iatropoulos, Dimitris | Dimitris Iatropoulos | Musical Director, Sound Designer | 1994 - 1999 | 3 | |
| Ilyés, Róbert | Róbert Ilyés | Actor | 1996 - 2005 | 3 | |
| Izabella, Varga | Varga Izabella | Actor | 1996 | 1 | |
| Irion, Kathrin | Kathrin Irion | Actor | 1996 | 1 | |
| Iannazzo, Silvia | Silvia Iannazzo | Actor | 1995 - 1996 | 12 | |
| Islam, Syed, Mohidul | Syed Mohidul Islam | Actor | 1996 | 1 | |
| Isajewicz-Telega, Ewa | Ewa Isajewicz-Telega | Actor | 1997 | 1 | |
| Ichise, Koji | Koji Ichise | Actor | 1996 | 1 | |
| Istria, Evelyne | Evelyne Istria | Actor | 1996 - 1997 | 3 | |
| Ingey, Yedwart | Yedwart Ingey | Actor | 1996 - 1997 | 18 | |
| Ikebe, Shinnichiro | Shinnichiro Ikebe | Composer | 1995 | 1 | |
| Ivánfy, Jenő | Jenő Ivánfy | Actor | 1890 - 1891 | 3 | |
| Igar, Stanisław | Stanisław Igar | Actor, Director | 1957 - 1975 | 2 | |
| Intercoiffeur, Jean | Jean Intercoiffeur | Mask Maker | 1997 | 1 | |
| Iranzo, Eli | Eli Iranzo | Actor | 2014 | 1 | |
| Ide, Minako | Minako Ide | Actor | 1997 | 1 | |
| Ilic, Dobrila | Dobrila Ilic | Actor | 1969 | 1 | |
| Indra, Tomáš | Tomáš Indra | Actor | 1997 | 4 | |
| Immenhausen, Wolfgang | Wolfgang Immenhausen | Actor | 1968 | 1 | |
| Ioannidou, Loula | Loula Ioannidou | Actor | 1961 - 1997 | 9 | |
| Ito, Takao | Takao Ito | Actor | 1968 | 1 | |
| Imai, Kazuko | Kazuko Imai | Actor | 1968 | 1 | |
| Iwakura, Takako | Takako Iwakura | Actor | 1968 | 1 | |
| Ishii, Yasuhiro | Yasuhiro Ishii | Designer | 1967 | 1 | |
| Ingvoldstad, Paul | Paul Ingvoldstad | Actor | 1967 | 1 | |
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