| Thomassen, John | John Thomassen | Actor | 2006 | 1 | |
| Thomassen, Kenneth | Kenneth Thomassen | Actor | 1998 | 10 | 1 |
| Thomassen, Knut | Knut Thomassen | Director | 1953 - 2006 | 6 | 1 |
| Thomassen, Per | Per Thomassen | Lighting Designer | 1971 | 44 | |
| Thomassen, Thomas | Thomas Thomassen | Actor | 1885 | 1 | 7 |
| Thomassen, Thomas Christian | Thomas Christian Thomassen | Actor, Director | 1901 - 1942 | 84 | 1 |
| Thomassen, Tine | Tine Thomassen | Dramaturg, Sound Designer | 2006 - 2016 | 263 | 2 |
| Thomassen, V.G. | V. G. Thomassen (V.G. Thomassen) | Actor | 1909 | 2 | |
| Thomasson, Peter | Peter Thomasson | Actor | 2010 | 1 | |
| Thomazini, Rafael | Rafael Thomazini | Sound Designer | 2025 | 1 | |
| Thomenius, Maija-Liisa | Maija-Liisa Thomenius | Costume Designer | 1977 - 1986 | 3 | |
| Thomer, Heinrich | Heinrich Thomer | Actor | 1949 - 1975 | 2 | |
| Thomer, Udo | Udo Thomer | Actor | 1970 | 1 | |
| Thommassen, Håvard Næss | Håvard Næss Thommassen | Actor | 2011 | 1 | |
| Thömmes, Matthias | Matthias Thömmes | Actor | 2011 - 2018 | 3 | 1 |
| Thommesen, Georg | Georg Thommesen | Actor | 1964 - 1966 | 30 | |
| Thommessen, Rolf Jacob | Rolf Jacob Thommessen | Actor | 2024 | 1 | |
| Thommessen, Nina Høstmælingen | Nina Høstmælingen Thommessen | Actor | 2024 | 1 | |
| Thommessen, Olav Anton | Olav Anton Thommessen | Composer | 1987 - 1989 | 2 | 1 |
| Thomopoulou, Sotiria | Sotiria Thomopoulou | Designer | 2006 | 1 | |
| Thompson, Abby | Abby Thompson | Actor | 2017 | 2 | |
| Thompson, Alan | Alan Thompson | Actor | 1958 | 1 | 1 |
| Thompson, Alice | Alice Thompson | Actor | 1941 | 1 | |
| Thompson, Amy | Amy Thompson | Actor | 2012 | 1 | |
| Thompson, Andre | Andre Thompson | Actor | 2004 | 1 | 1 |
| Thompson, Anthea | Anthea Thompson | Actor | 2015 - 2016 | 2 | |
| Thompson, Aubrey | Aubrey Thompson | Actor | 1913 | 1 | |
| Thompson, Betty | Betty Thompson | Actor | 1974 | 1 | |
| Thompson, Bill | Bill Thompson | Composer | 1991 | 1 | |
| Thompson, Bill | Bill Thompson | Lighting Designer | 1964 | 1 | |
| Thompson, Bob | Bob Thompson | Actor | 1972 | 1 | |
| Thompson, Brian | Brian Thompson | Actor | 1962 - 2008 | 2 | |
| Thompson, Brooklyn | Brooklyn Thompson | Actor | 2018 | 1 | |
| Thompson, C. G. | C. G. Thompson | Actor | 1913 | 1 | |
| Thompson, Carl | Carl Thompson | Actor, Designer | 1939 | 2 | |
| Thompson, Carol | Carol Thompson | Actor, Costume Designer | 2000 - 2012 | 2 | |
| Thompson, Carter | Carter Thompson | Designer | 2012 | 1 | |
| Thompson, Charles | Charles Thompson | Actor | 1951 | 1 | |
| Thompson, Chelsea | Chelsea Thompson | Actor | 2010 | 1 | |
| Thompson, Clara | Clara Thompson | Actor | 1904 - 1906 | 3 | 1 |
| Thompson, Daryl | Daryl Thompson | Actor | 2004 | 1 | |
| Thompson, David | David Thompson | Director | 1958 - 1963 | 2 | 1 |
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