| Inokuma, Tsunekazu | Tsunekazu Inokuma | Actor | 2006 | 3 | |
| Inger, Manfred | Manfred Inger | Actor | 1960 - 1964 | 3 | |
| Iparraguirre, Iván | Iván Iparraguirre | Actor, Adaptation, Director | 2006 | 3 | 1 |
| Im, Kang Cheong | Kang Cheong Im | Actor | 2009 - 2012 | 3 | |
| Insel, Diana | Diana Insel | Dramaturg | 2009 - 2013 | 3 | |
| Irle, Eddie | Eddie Irle | Actor | 2016 | 3 | |
| Ivo, Barišič | Barišič Ivo | Actor | 2010 - 2012 | 3 | 1 |
| Innes, George | George Innes | Actor | 1964 - 1965 | 3 | |
| Ionescu, C. | C. Ionescu | Actor | 1894 - 1901 | 3 | |
| Ionescu, Lucian | Lucian Ionescu | Musical Director | 1955 - 1966 | 3 | |
| Ifrim, Nicolae | Nicolae Ifrim | Actor | 1955 - 1976 | 3 | |
| Ivo, L. | L. Ivo | Designer | 1956 - 1957 | 3 | |
| Iliev, Jana | Jana Iliev | Actor | 1998 - 2000 | 3 | |
| Ihalainen, Marjukka | Marjukka Ihalainen | Actor | 1998 | 3 | |
| Iivanainen, Hilkka-Liisa | Hilkka-Liisa Iivanainen | Director, Dramaturg, Sound Designer | 2012 | 3 | |
| Ionescu Micu, Antonia | Antonia Ionescu Micu | Actor | 2016 | 3 | |
| Ives, Harry | Harry Ives | Actor | 1964 - 1969 | 3 | |
| Icke, Robert | Robert Icke | Director, Playwright | 2018 - 2021 | 3 | |
| Izsó, Miklós | Miklós Izsó | Actor | 1922 - 1927 | 3 | |
| Izsáki, Margit | Margit Izsáki | Actor | 1922 - 1927 | 3 | |
| Ilardo, Scilla | Scilla Ilardo | Costume Designer | 2018 | 3 | |
| Irondelle, Séverine | Séverine Irondelle | Costume Designer | 2018 | 3 | |
| Imboden, Stephan | Stephan Imboden | Actor | 2018 | 3 | |
| Ida, Shuji | Shuji Ida | Actor | 1968 - 1994 | 4 | |
| Innilä, Jouni | Jouni Innilä | Actor | 1998 - 2002 | 4 | |
| Ivan, Rosalind | Rosalind Ivan | Actor | 1907 - 1911 | 4 | 1 |
| Iglewski, Richard S. | Richard S. Iglewski | Actor | 1996 - 2008 | 4 | |
| Ildikó, László | László Ildikó | Costume Designer | 2008 - 2010 | 4 | |
| Illing, Vilma | Vilma Illing | Actor | 1900 | 4 | |
| Illiger, Astrid | Astrid Illiger | Actor | 1933 - 1938 | 4 | |
| Ikonomova, Manja | Manja Ikonomova | Actor | 1902 - 1907 | 4 | |
| Ionidou, Korinna | Korinna Ionidou | Actor | 1903 | 4 | |
| Innemann, Rudolf | Rudolf Innemann | Actor | 1904 - 1907 | 4 | |
| Idriss, Marjam | Marjam Idriss | Actor | 2011 - 2012 | 4 | 1 |
| Ilboudo, Flora | Flora Ilboudo | Actor | 2002 - 2015 | 4 | |
| Indira, - | - Indira | Actor | 2008 - 2011 | 4 | |
| Ikäheimo, Rauni | Rauni Ikäheimo | Actor | 1967 - 1981 | 4 | |
| Isaïa, Lela | Lela Isaïa | Actor | 1933 - 1944 | 4 | |
| Izetbegović, Maja | Maja Izetbegović | Actor | 2009 | 4 | |
| Isailovits, Michael | Michael Isailovits | Actor | 1890 - 1920 | 4 | |
| Iranzo, Antonio | Antonio Iranzo | Actor | 1968 - 1982 | 4 | 1 |
| Irbil, Clement | Clement Irbil | Lighting Designer | 2014 - 2023 | 4 | |
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