| Iliff, Noel | Noel Iliff | Actor, Designer, Director, Producer | 1931 - 1938 | 8 | |
| Iannetta, Gaetano | Gaetano Iannetta | Actor, Musical Director | 2017 | 8 | |
| Immisch, Marie | Marie Immisch | Actor | 1887 - 1909 | 9 | |
| Illiger, Hans | Hans Illiger | Actor | 1899 - 1933 | 9 | |
| Ingle, Graham | Graham Ingle | Actor | 1994 | 9 | |
| Indahl-Voss, Signe | Signe Indahl-Voss | Actor | 1928 - 1931 | 9 | |
| Ioannidou, Loula | Loula Ioannidou | Actor | 1961 - 1997 | 9 | |
| Imre, Éva | Éva Imre | Actor | 2017 - 2019 | 9 | |
| Ibsen, Lillebil | Lillebil Ibsen | Actor | 1923 - 1956 | 10 | 1 |
| Irrall, Elfriede | Elfriede Irrall | Actor | 1969 - 2009 | 10 | |
| Ito, Kazuko | Kazuko Ito | Actor | 2000 - 2012 | 10 | |
| Irwin, Julius | Julius Irwin | Actor | 1893 - 1901 | 10 | |
| Isam, Tamer | Tamer Isam | Musician | 2013 | 10 | |
| Iacuzio, Luigi | Luigi Iacuzio | Actor | 1999 - 2001 | 10 | |
| Iversen, Einar | Einar Iversen | Musical Director | 1974 | 10 | |
| Irgens-Hansen, Mari | Mari Irgens-Hansen | Actor | 1891 - 1921 | 11 | 1 |
| Ikonomov, Matej | Matej Ikonomov | Actor, Director | 1898 - 1915 | 11 | |
| Ivarson-Moe, Anna | Anna Ivarson-Moe | Actor, Director | 1919 - 1928 | 11 | 1 |
| Ihász, László | László Ihász | Actor | 1925 - 1941 | 11 | |
| Ibrahim, George | George Ibrahim | Adaptation, Director | 2008 | 12 | |
| Iannazzo, Silvia | Silvia Iannazzo | Actor | 1995 - 1996 | 12 | |
| Ingólfsson, Lárus | Lárus Ingólfsson | Actor, Costume Designer, Designer | 1942 - 1965 | 13 | |
| Iden, Beata, Kretovicova | Beata Kretovicova Iden | Dancer | 2006 - 2011 | 13 | |
| Iversen, Fredrik | Fredrik Iversen | Actor | 2001 - 2007 | 14 | |
| Ingenohl, Oskar | Oskar Ingenohl | Actor | 1911 - 1919 | 15 | |
| Isaksen, Oddleiv | Oddleiv Isaksen | Actor | 1997 - 2002 | 15 | |
| Ingargiola, Alessandra | Alessandra Ingargiola | Actor | 2002 - 2005 | 16 | |
| Iordanidis, Giannis | Giannis Iordanidis | Actor, Director, Dramaturg, Translator | 1965 - 2008 | 16 | |
| Isaksen, Stian | Stian Isaksen | Actor | 2018 - 2020 | 16 | |
| Isene, Ola | Ola S. Isene (Ola Isene) | Actor | 1942 - 1978 | 17 | 1 |
| Idema, Emke | Emke Idema | Actor | 2008 | 17 | |
| Irrmisch, Holger | Holger Irrmisch | Actor | 1996 - 2007 | 18 | 2 |
| Ingey, Yedwart | Yedwart Ingey | Actor | 1996 - 1997 | 18 | |
| Ito, Masako | Masako Ito | Designer | 2006 - 2010 | 18 | |
| Ipsen, Bodil | Bodil Ipsen | Actor, Director | 1924 - 2004 | 20 | 1 |
| Itimu, Mariam Shaibu | Mariam Shaibu Itimu | Actor | 2006 | 22 | |
| Ivarson, Svanhild | Svanhild Ivarson | Actor | 1996 - 2009 | 22 | |
| Innvær, Gunnar | Gunnar Innvær | Sound Designer | 2016 - 2018 | 23 | |
| Isefiær, Ellen | Ellen Isefiær | Actor, Director | 1928 - 2006 | 26 | 3 |
| Iwuji, Chukwudi | Chukwudi Iwuji | Actor | 2016 - 2018 | 27 | |
| Irish, Neil | Neil Irish | Designer | 1999 | 30 | |
| IJgosse, Matthijs | Matthijs IJgosse | Actor | 2014 - 2017 | 30 | |
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