| Thanopoulos, Paulos | Paulos Thanopoulos | Costume Designer | 2006 | 1 | |
| Torii, Teruko | Teruko Torii | Costume Designer | 2009 - 2010 | 3 | |
| Tillery, Jennifer | Jennifer Tillery | Costume Designer | 2009 | 1 | |
| Theodoricus, - | - Theodoricus | Costume Designer | 2009 | 1 | |
| Thoss, Sabine | Sabine Thoss | Costume Designer | 2010 | 1 | |
| Tillemann, Bonnie | Bonnie Tillemann | Costume Designer | 2011 | 1 | |
| Thibout, Aurore | Aurore Thibout | Costume Designer | 2015 | 15 | |
| Tsami, Ioanna | Ioanna Tsami | Costume Designer | 2012 - 2020 | 5 | |
| Tomassi, Flavia | Flavia Tomassi | Costume Designer | 2016 | 4 | |
| Teljola, Helmi | Helmi Teljola | Costume Designer | 1962 | 1 | |
| Toblini, Fabio | Fabio Toblini | Costume Designer | 2012 | 1 | 1 |
| Teti, Carla | Carla Teti | Costume Designer | 2013 | 27 | |
| Tran, Jessica | Jessica Tran | Costume Designer | 2013 | 1 | |
| Turner, Stella | Stella Turner | Costume Designer | 1958 | 1 | |
| Trutko, Helen | Helen Trutko | Costume Designer | 1951 | 1 | |
| Travis, Leonor | Leonor Travis | Costume Designer | 1951 | 1 | |
| ten Berge, Hadewych | Hadewych ten Berge | Costume Designer | 1999 | 1 | |
| Tandberg, Gerilyn | Gerilyn Tandberg | Costume Designer | 1999 | 1 | |
| Takase, Kurumi | Kurumi Takase | Costume Designer | 1999 | 1 | |
| Tostado, Casa | Casa Tostado | Costume Designer | 1944 | 1 | |
| Tierney, Patricia | Patricia Tierney | Costume Designer | 1947 | 1 | |
| Teglers, Ole | Ole Teglers | Costume Designer | 1948 | 1 | |
| Tam, Mandy | Mandy Tam | Costume Designer | 2014 | 1 | |
| Tărășescu Jianu, Eugenia | Eugenia Tărășescu Jianu | Costume Designer | 2013 | 1 | |
| Tschetter, Jane | Jane Tschetter | Costume Designer | 1978 | 1 | |
| Tilley, Martin | Martin Tilley | Costume Designer | 1981 | 1 | |
| Türkoğlu, Nalan | Nalan Türkoğlu (Nalan Turkoglu) | Costume Designer | 1987 | 1 | |
| Tait, Nikki | Nikki Tait | Costume Designer | 1984 | 1 | |
| Turcanu, A. | A. Turcanu | Costume Designer | 1964 | 2 | |
| Tosa, Yoshi | Yoshi Tosa | Costume Designer | 1976 | 1 | |
| Tasdighi, Manijeh | Manijeh Tasdighi | Costume Designer | 2018 | 1 | |
| Taran, Sabine | Sabine Taran | Costume Designer | 2018 - 2019 | 8 | |
| Téroitin, Patrick | Patrick Téroitin | Costume Designer | 1994 | 4 | |
| Trikerioti, Mayou | Mayou Trikerioti | Costume Designer | 2022 | 4 | |
| Toobe, Federico | Federico Toobe | Costume Designer | 2023 | 1 | |
| Tihanyi, Ildikó | Ildikó Tihanyi | Costume Designer | 2022 | 1 | |
| Toser, David | David Toser | Costume Designer | 2019 | 1 | |
| Trudell, Patricia | Patricia Trudell | Costume Designer | 2024 | 1 | |
| Tukan, Beatrix | Beatrix Tukan | Costume Designer | 2019 | 1 | |
| Thakur, Naveen Singh | Naveen Singh Thakur | Conductor, Musician | 2016 - 2017 | 4 | |
| Thaulow, Chr. | Chr. Thaulow | Conductor, Musical Director | 1921 | 3 | |
| Tobiasj, E., Semjononvitsj | E. Semjononvitsj Tobiasj | Conductor | 1997 | 1 | |
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