| Ivo, L. | L. Ivo | Designer | 1956 - 1957 | 3 | |
| Ito, Toshikazu | Toshikazu Ito | Designer | 1953 | 1 | |
| Ingelius, Karl | Karl Ingelius | Designer | 1941 | 1 | 1 |
| Ivars, Ramón | Ramón Ivars | Designer | 1982 | 1 | |
| Ile, Olav | Olav Ile | Designer | 1968 | 1 | |
| Iglich, Bernadette | Bernadette Iglich | Dancer | 1990 | 2 | |
| Inao, Yoshifumi | Yoshifumi Inao | Dancer | 2014 - 2019 | 8 | |
| Inger, Carl | Carl Inger | Dancer | 1992 | 1 | |
| Irigoyen, Magdalena | Magdalena Irigoyen | Dancer | 1992 | 1 | |
| Iden, Beata, Kretovicova | Beata Kretovicova Iden | Dancer | 2006 - 2011 | 13 | |
| Ivi, Hadjivasiliou | Hadjivasiliou Ivi | Dancer | 2019 | 1 | |
| Isailović, Miloš | Miloš Isailović | Dancer | 2016 - 2019 | 5 | |
| Illera, Berta | Berta Illera | Dancer | 2017 - 2020 | 2 | |
| Ishiko, Kanako | Kanako Ishiko | Dancer | 2021 | 2 | |
| Isaacson, Walter Stuart | Walter Stuart Isaacson | Dancer | 2020 | 1 | |
| Ivanova, Elena | Elena Ivanova | Costume Designer, Designer | 1991 | 2 | |
| Ivančík, Erik | Erik Ivančík | Costume Designer, Designer | 2006 - 2007 | 6 | |
| Ivars Amich, Ramón B. | Ramón B. Ivars | Costume Designer, Designer | 1996 | 2 | |
| Innerstedt, Gabriella | Gabriella Innerstedt | Costume Designer | 2000 | 1 | |
| Ildikó, László | László Ildikó | Costume Designer | 2008 - 2010 | 4 | |
| Insull, Sigrid | Sigrid Insull | Costume Designer | 1977 | 1 | |
| Itoh, Sachiko | Sachiko Itoh | Costume Designer | 2008 | 1 | |
| Isono, Seiko | Seiko Isono | Costume Designer | 1997 | 1 | |
| Ines, Zofia de | Zofia de Ines | Costume Designer | 1997 | 1 | |
| Ipat'eva, Anna | Anna Ipat'eva | Costume Designer | 2003 - 2005 | 2 | |
| I. Elísdóttir, Filippía | Filippía I. Elísdóttir | Costume Designer | 2001 - 2011 | 4 | |
| Indira | Indira - | Costume Designer | 2001 | 1 | |
| Islam, Sumee | Sumee Islam | Costume Designer | 2006 | 4 | |
| Ince-Kitson, Rachael | Rachael Ince-Kitson | Costume Designer | 2017 | 4 | |
| Ilić, Maja | Maja Ilić | Costume Designer | 1983 | 2 | |
| Ilardo, Scilla | Scilla Ilardo | Costume Designer | 2018 | 3 | |
| Irondelle, Séverine | Séverine Irondelle | Costume Designer | 2018 | 3 | |
| Ile, Kari Bjørg | Kari Bjørg Ile | Costume Designer | 1968 | 1 | |
| Iliopoulou, Tzina | Tzina Iliopoulou | Costume Designer | 2023 | 2 | |
| Iliopoulou, Gina | Gina Iliopoulou (Τζίνα Ηλιοπούλου) | Costume Designer | 2022 - 2023 | 4 | |
| Indraccolo, Lilian | Lilian Indraccolo | Costume Designer | 2024 | 1 | |
| Ionescu-Galați, Ilarion | Ilarion Ionescu-Galați | Conductor | 2014 | 1 | |
| Ingebretsen, Kjell | Kjell Ingebretsen | Conductor | 1984 | 1 | |
| Ito, Genji | Genji Ito | Composer, Sound Designer | 1997 | 2 | |
| Iseri, Scott | Scott Iseri | Composer, Sound Designer | 2008 | 2 | |
| Ireland, Greg | Greg Ireland | Composer, Musician | 2018 | 2 | |
| Ishii, Toru | Toru Ishii | Composer | 1978 | 1 | |
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