| Iversen, Trine | Trine Iversen | Actor, Lighting Designer | 1988 | 2 | |
| Iordanidis, Giannis | Giannis Iordanidis | Actor, Director, Dramaturg, Translator | 1965 - 2008 | 16 | |
| Inness, Jean | Jean Inness | Actor, Director | 1934 - 1935 | 3 | |
| Ipsen, Bodil | Bodil Ipsen | Actor, Director | 1924 - 2004 | 20 | 1 |
| Indriðadóttir, Guðrún | Guðrún Indriðadóttir | Actor, Director | 1905 - 1927 | 6 | |
| Ikonomov, Matej | Matej Ikonomov | Actor, Director | 1898 - 1915 | 11 | |
| in der Au, Ottomar | Ottomar in der Au | Actor, Director | 1946 | 2 | |
| Isefiær, Ellen | Ellen Isefiær | Actor, Director | 1928 - 2006 | 26 | 3 |
| Ivarson-Moe, Anna | Anna Ivarson-Moe | Actor, Director | 1892 - 1928 | 13 | 1 |
| Ichikawa, Ennosuke | Ennosuke Ichikawa | Actor, Director | 1913 - 1922 | 3 | |
| Ivarson, Victor | Victor Ivarson | Actor, Director | 1923 - 1928 | 6 | 1 |
| Ilmari, Vilho | Vilho Ilmari | Actor, Director | 1928 - 1954 | 6 | |
| Igar, Stanisław | Stanisław Igar | Actor, Director | 1957 - 1975 | 2 | |
| Iordănescu, Ştefan | Ştefan Iordănescu | Actor, Director | 1970 - 1998 | 6 | |
| Iacoban, Radu | Radu Iacoban | Actor, Director | 2011 - 2025 | 4 | |
| Ioannou, Styliana | Styliana Ioannou | Actor, Director | 2017 - 2018 | 4 | |
| Isailović, Mihailo | Mihailo Isailović | Actor, Director | 1923 | 2 | |
| Iliff, Noel | Noel Iliff | Actor, Designer, Director, Producer | 1931 - 1938 | 8 | |
| Ivey, Derrick | Derrick Ivey | Actor, Designer | 2003 - 2015 | 3 | 1 |
| Ignat, Diana | Diana Ignat | Actor, Dancer | 2005 | 3 | |
| Iacob, Gabriela | Gabriela Iacob | Actor, Dancer | 2005 | 3 | |
| Ireys, John | John Ireys | Actor, Dancer | 1940 | 6 | |
| Ingólfsson, Lárus | Lárus Ingólfsson | Actor, Costume Designer, Designer | 1942 - 1965 | 13 | |
| Irving, Laurence | Laurence Irving | Actor, Costume Designer, Designer | 1894 - 1955 | 8 | 1 |
| Iacov, Adrian | Adrian Iacov | Actor, Assistant Director | 2010 | 8 | |
| Iniwa, Takashi | Takashi Iniwa | Actor, Adaptation, Director, Translator | 1912 - 1914 | 7 | |
| Iparraguirre, Iván | Iván Iparraguirre | Actor, Adaptation, Director | 2006 | 3 | 1 |
| Iványi, Irén M. | Irén M. Iványi | Actor | 1914 - 1941 | 7 | |
| Isgandarli, Sanubar | Sanubar Isgandarli | Actor | 2006 | 1 | |
| Ingilizova, Anastasija | Anastasija Ingilizova | Actor | 2006 | 1 | |
| Ibsen, Lillebil | Lillebil Ibsen | Actor | 1923 - 1956 | 10 | 1 |
| Ichihara, Etsuko | Etsuko Ichihara | Actor | 1968 | 1 | |
| Icke, Gisela | Gisela Icke | Actor | 1973 - 1980 | 2 | |
| Ida, Shuji | Shuji Ida | Actor | 1968 - 1994 | 4 | |
| Igawa, Kujaku | Kujaku Igawa | Actor | 1913 - 1914 | 2 | |
| Igová, Cvetana | Cvetana Igová | Actor | 1975 | 1 | |
| Iida, Kazuhei | Kazuhei Iida | Actor | 1989 | 1 | |
| Ikonen, Ansa | Ansa Ikonen | Actor | 1943 - 1955 | 3 | |
| Ilku, David | David Ilku | Actor | 2000 | 1 | 1 |
| Illers, Susanne | Susanne Illers | Actor | 1980 - 1983 | 2 | |
| Imhoof, Erika | Erika Imhoof | Actor | 2002 | 1 | 1 |
| Ingargiola, Alessandra | Alessandra Ingargiola | Actor | 2002 - 2005 | 16 | |
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