| 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 | |
| Isaksen, Phillip | Phillip Isaksen | Lighting Designer | 2018 - 2020 | 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 | |
| Iba, Shigeaki | Shigeaki Iba | Sound Designer | 2000 - 2007 | 2 | |
| Icke, Gisela | Gisela Icke | Actor | 1973 - 1980 | 2 | |
| Igawa, Kujaku, | Kujaku Igawa | Actor | 1913 - 1914 | 2 | |
| Illers, Susanne | Susanne Illers | Actor | 1980 - 1983 | 2 | |
| Ito, Tomoko | Tomoko Ito | Actor | 1984 - 1997 | 2 | |
| Il'in, Ju | Ju Il'in | Actor | 1999 - 2000 | 2 | |
| Iversen, Oscar, | Oscar Iversen | Actor | 1876 - 1899 | 2 | |
| Isert, Mr., | Mr. Isert | Actor | 1888 | 2 | |
| Isleiber, Mr., | Mr. Isleiber | Actor | 1888 | 2 | |
| Ising Jr., Arnold, | Arnold Ising Jr. | Actor, Translator | 1889 | 2 | |
| Idali, Joseph, | Joseph Idali | Actor | 1895 - 1898 | 2 | |
| Illing, Meta, | Meta Illing | Actor | 1893 - 1899 | 2 | |
| Ingo-Brandt, Alex, | Alex Ingo-Brandt | Actor | 1910 - 1911 | 2 | |
| Ihle, Peter, | Peter Ihle | Actor | 1921 - 1927 | 2 | |
| Iblacker, Edmund, | Edmund Iblacker | Actor | 1932 | 2 | |
| in der Au, Ottomar, | Ottomar in der Au | Actor, Director | 1946 | 2 | |
| in der Au, Majo, | Majo in der Au | Actor | 1946 | 2 | |
| Inskaja, V. O., | V. O. Inskaja (V. O. Inskaja) | Actor | 1900 - 1903 | 2 | |
| Indriðadóttir, Lára, | Lára Indriðadóttir | Actor | 1903 - 1904 | 2 | |
| Indarte, Pérez, | Pérez Indarte | Actor | 1906 - 1907 | 2 | |
| Ingebricson, Eirik, | Eirik Ingebricson | Lighting Designer | 1995 - 1996 | 2 | |
| Ingebrigtsen, Tove, | Tove Ingebrigtsen | Mask Maker | 1996 - 2004 | 2 | |
| Isaksen, Marthe, | Marthe Isaksen | Actor | 2003 - 2004 | 2 | |
| Indergaard, Jan-Emil, | Jan-Emil Indergaard | Sound Designer | 2006 - 2007 | 2 | |
| Igesund, Lars, | Lars Igesund | Musician | 2006 - 2008 | 2 | |
| Inderhaug, Eir, | Eir Inderhaug | Actor | 2007 - 2008 | 2 | |
| Isungset, Terje, | Terje Isungset | Musician | 2009 - 2010 | 2 | |
| Iversen, Solrun Toft, | Solrun Toft Iversen | Dramaturg | 2011 - 2014 | 2 | |
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