| Ingvarsson, Bjarni | Bjarni Ingvarsson | Actor | 1975 | 1 | |
| Ingvoldstad, Paul | Paul Ingvoldstad | Actor | 1967 | 1 | |
| Iniwa, Takashi | Takashi Iniwa | Actor, Adaptation, Director, Translator | 1912 - 1914 | 7 | |
| Inman, Allen | Allen Inman | Actor | 2008 | 1 | |
| Inman, Belle | Belle Inman | Actor | 1883 | 1 | |
| Inman, Eric | Eric Inman | Director | 2012 | 1 | |
| Innemann, Rudolf | Rudolf Innemann | Actor | 1904 - 1907 | 4 | |
| Innerstedt, Gabriella | Gabriella Innerstedt | Costume Designer | 2000 | 1 | |
| Innes, Elaine | Elaine Innes | Actor | 2003 | 1 | |
| Innes, George | George Innes | Actor | 1964 - 1965 | 3 | |
| Innes, Laura | Laura Innes | Actor | 1984 | 1 | |
| Inness, Jean | Jean Inness | Actor, Director | 1934 - 1935 | 3 | |
| Innilä, Jouni | Jouni Innilä | Actor | 1998 - 2002 | 4 | |
| Innocenti, Aldo | Aldo Innocenti | Actor | 1999 - 2019 | 2 | |
| Innocenti, Filippo | Filippo Innocenti | Actor | 1999 | 1 | |
| Innocenti, Giulia | Giulia Innocenti | Actor | 2003 | 4 | |
| Innset, Iver | Iver Innset | | | | |
| Innvær, Gunnar | Gunnar Innvær | Sound Designer | 2016 - 2018 | 23 | |
| Inokuma, Tsunekazu | Tsunekazu Inokuma | Actor | 2006 | 3 | |
| Inoue, Ken-ichi | Ken-ichi Inoue | Actor | 2006 | 1 | |
| Inoue, Masaru | Masaru Inoue | Actor | 1912 | 1 | |
| Inoue, Norihiro | Norihiro Inoue | Actor | 1990 - 1997 | 2 | |
| Inoue, Takumi | Takumi Inoue | Actor | 2008 | 1 | |
| Inoue, Yuichiro | Yuichiro Inoue | Actor | 1999 | 1 | |
| Inovlockij, Leonid | Leonid Inovlockij | Composer | 1999 | 1 | |
| Inqilqane, Sarah | Sarah Inqilqane | Actor | 2004 | 1 | |
| Insausti, Garbiñe | Garbiñe Insausti | Actor | 2004 | 2 | |
| Insel, Diana | Diana Insel | Dramaturg | 2009 - 2013 | 3 | |
| Insenga, Gaia | Gaia Insenga | Actor | 2008 | 1 | |
| Inskaja, V. O. | V. O. Inskaja | Actor | 1900 - 1903 | 2 | |
| Insley, Nick | Nick Insley | Lighting Designer | 2004 - 2023 | 2 | |
| Instefjord, Herman | Herman Instefjord | Actor | 2010 | 1 | |
| Insull, Sigrid | Sigrid Insull | Costume Designer | 1977 | 1 | |
| intendant, teatrets | teatrets intendant | Director | 1920 | 1 | |
| Intercoiffeur, Jean | Jean Intercoiffeur | Mask Maker | 1997 | 1 | |
| Interne Teater, Studentersamfundets | Studentersamfundets Interne Teater | Adaptation | 1994 | 1 | |
| Intert, Arthur | Arthur Intert | Actor | 1973 | 1 | |
| Invernici, Felice | Felice Invernici | Actor | 1986 | 2 | |
| Inwenden, Franz | Franz Inwenden | Actor | 1955 | 1 | |
| Inwood, Joan | Joan Inwood | Actor | 1978 | 1 | |
| Inzko, Simone | Simone Inzko | Translator | 2002 | 2 | |
| Ioan Popov, Diana | Diana Ioan Popov | Designer | 1972 | 1 | |
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