| 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 | |
| Iannone, Valentina | Valentina Iannone | Actor | 2013 - 2014 | 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 | |
| Indra, Tomáš | Tomáš Indra | Actor | 1997 | 4 | |
| Innocenti, Giulia | Giulia Innocenti | Actor | 2003 | 4 | |
| I. Elísdóttir, Filippía | Filippía I. Elísdóttir | Costume Designer | 2001 - 2011 | 4 | |
| Indrehus, Endre | Endre Indrehus | Actor | 2004 | 4 | |
| Ionescu, Şerban | Şerban Ionescu | Actor | 1977 | 4 | |
| Irimia, Cristian | Cristian Irimia | Actor | 1977 | 4 | |
| Impens, Els | Els Impens | Actor | 2006 | 4 | |
| Islam, Sumee | Sumee Islam | Costume Designer | 2006 | 4 | |
| Idman, Gogo | Gogo Idman | Actor | 2008 | 4 | 1 |
| Iden, Rosalind | Rosalind Iden | Actor | 1943 - 1950 | 4 | |
| Izon, John | John Izon | Director | 1943 - 1948 | 4 | |
| István, Bessenyei | Bessenyei István | Actor | 2008 - 2014 | 4 | |
| Ince-Kitson, Rachael | Rachael Ince-Kitson | Costume Designer | 2017 | 4 | |
| Ioannou, Styliana | Styliana Ioannou | Actor, Director | 2017 - 2018 | 4 | |
| Isaksen, Phillip | Phillip Isaksen | Lighting Designer | 2018 - 2022 | 4 | |
| Iliopoulou, Gina | Gina Iliopoulou (Τζίνα Ηλιοπούλου) | Costume Designer | 2022 - 2023 | 4 | |
| Inaoka, Shojun | Shojun Inaoka | Director | 1984 - 1997 | 5 | |
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