| Isaïa, Smaragda | Smaragda Isaïa | Actor | 1902 | 1 | |
| Ikonomova, Manja | Manja Ikonomova | Actor | 1902 - 1907 | 4 | |
| Indriðadóttir, Lára | Lára Indriðadóttir | Actor | 1903 - 1904 | 2 | |
| Indriðadóttir, Ingibjörg | Ingibjörg Indriðadóttir | Actor | 1903 | 1 | |
| Ionidou, Korinna | Korinna Ionidou | Actor | 1903 | 4 | |
| Isaïas, Xenofon | Xenofon Isaïas | Actor | 1903 | 1 | |
| Innemann, Rudolf | Rudolf Innemann | Actor | 1904 - 1907 | 4 | |
| Iakovidis, Michaïl | Michaïl Iakovidis | Actor | 1908 - 1935 | 6 | |
| Italiaander, - | - Italiaander | Actor | 1908 | 1 | |
| Ichikawa, Danshi | Danshi Ichikawa | Actor | 1909 | 1 | |
| Ichikawa, Enjaku | Enjaku Ichikawa | Actor | 1909 | 1 | |
| Ichikawa, Samasu | Samasu Ichikawa | Actor | 1909 | 1 | |
| Ichikawa, Shocho | Shocho Ichikawa | Actor | 1909 | 1 | |
| Iliinskaia, Varvara | Varvara Iliinskaia | Actor | 1909 | 1 | |
| Iakovidou, Aspasia | Aspasia Iakovidou | Actor | 1909 | 1 | |
| Interne Teater, Studentersamfundets | Studentersamfundets Interne Teater | Adaptation | 1994 | 1 | |
| Ingle, Graham | Graham Ingle | Actor | 1994 | 9 | |
| Iversen, Mette | Mette Iversen | Actor | 1993 | 1 | |
| Indregard, Kjetil | Kjetil Indregard | Actor | 1993 | 1 | |
| Ingebricson, Eirik | Eirik Ingebricson | Lighting Designer | 1995 - 1996 | 2 | |
| Ingebrigtsen, Tove | Tove Ingebrigtsen | Mask Maker | 1996 - 2004 | 2 | |
| Ivarson, Svanhild | Svanhild Ivarson | Actor | 1996 - 2009 | 22 | |
| Isaksen, Oddleiv | Oddleiv Isaksen | Actor | 1997 - 2002 | 15 | |
| Iversen, Lars-Petter | Lars-Petter Iversen | Actor | 1998 | 1 | |
| Iversen, Fredrik | Fredrik Iversen | Actor | 2001 - 2007 | 14 | |
| Isaksen, Marthe | Marthe Isaksen | Actor | 2003 - 2004 | 2 | |
| Iversen, Anna | Anna Iversen | Actor | 2004 - 2007 | 8 | |
| Igesund, Lars | Lars Igesund | Musician | 2006 - 2008 | 2 | |
| Ibsen, Nora | Nora Ibsen | Producer | 2006 | 1 | |
| Inderhaug, Eir | Eir Inderhaug | Actor | 2007 - 2008 | 2 | |
| Isdal, Lars | Lars Isdal | Actor | 2008 | 3 | |
| Ibkheet, Abdullah | Abdullah Ibkheet | Actor | 2008 | 3 | |
| Ingelsrud, Hans Kristian | Hans Kristian Ingelsrud | Actor | 2009 | 1 | |
| Ingeborgrud, Lina Hopaneng | Lina Hopaneng Ingeborgrud | Actor | 2009 | 1 | |
| Isungset, Terje | Terje Isungset | Musician | 2009 - 2010 | 2 | |
| Instefjord, Herman | Herman Instefjord | Actor | 2010 | 1 | |
| Iversen, Solrun Toft | Solrun Toft Iversen | Dramaturg | 2011 - 2014 | 2 | |
| Ingebretsen, Nils | Nils Ingebretsen | Actor | 2011 | 1 | |
| Irgens, Nadine Lehmann | Nadine Lehmann Irgens | Actor | 2012 | 1 | |
| Ilie, Tinca | Tinca Ilie | Actor | 2012 | 1 | |
| Irgen, Lilly | Lilly Irgen | Actor | 1911 | 1 | |
| Ichikawa, Teijiro | Teijiro Ichikawa | Actor | 1912 | 1 | |
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