| Inderfurth, Daniel | Daniel Inderfurth | Actor | 1985 | 1 | |
| Ilko, Donald W. | Donald W. Ilko | Director | 1986 | 1 | |
| Ištvan, Rostislav | Rostislav Ištvan | Actor | 1986 | 1 | |
| Ištvan, Miloslav | Miloslav Ištvan | Actor | 1986 | 1 | |
| Ištvan, Miloš | Miloš Ištvan | Composer | 1986 | 1 | |
| Ihle, Emma, Lola | Emma Lola Ihle | Actor | 2014 | 1 | |
| Inao, Yoshifumi | Yoshifumi Inao | Dancer | 2014 - 2019 | 8 | |
| Ikävalko, Matias | Matias Ikävalko | Actor | 1984 | 1 | |
| Ilyukhina, Svetlana | Svetlana Ilyukhina (Светлана Илюхина) | Actor | 2011 | 1 | |
| Ioannou, Odetti | Odetti Ioannou | Actor | 1991 - 2001 | 3 | |
| Irwin, Philip | Philip Irwin | Actor | 1990 | 1 | |
| Ignácz, György | György Ignácz | Actor | 1991 | 1 | |
| Izsóf, Vilmos | Vilmos Izsóf | Actor | 1991 | 1 | |
| Ivánka, Csaba | Csaba Ivánka | Actor | 1991 | 1 | |
| Inoue, Norihiro | Norihiro Inoue | Actor | 1990 - 1997 | 2 | |
| Isajeva, Alla | Alla Isajeva | Actor | 1956 | 1 | |
| Infante, Diogo | Diogo Infante | Actor | 1992 | 1 | |
| Isensee, Helga | Helga Isensee | Actor | 1992 | 1 | |
| Iwashita, Hiroshi | Hiroshi Iwashita | Actor | 1991 | 1 | |
| Ingram, Robin | Robin Ingram | Actor | 1992 | 1 | |
| Iversen, Trine | Trine Iversen | Actor, Lighting Designer | 1988 | 2 | |
| Ianculescu, Dinu | Dinu Ianculescu | Actor | 1989 - 1992 | 2 | |
| Ibáñez, José González | José González Ibáñez | Actor | 1982 | 2 | |
| Inger, Carl | Carl Inger | Dancer | 1992 | 1 | |
| Irigoyen, Magdalena | Magdalena Irigoyen | Dancer | 1992 | 1 | |
| 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 | |
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