Apart from straight theatre, Gründgens also worked with Otto Klemperer at the Kroll Opera, as a Kabarett artist and also as a movie actor, most notably in Fritz Lang's 1931 film M, which decisively added to his popularity.
Carl XVI Gustaf of Sweden | Carl Gustaf Emil Mannerheim | Gustaf VI Adolf of Sweden | Gustaf Bonde | Gustaf V of Sweden | Gustaf Tenggren | Gustaf Fröding | Erik Gustaf Geijer | Carl-Gustaf Rossby | Isak Gustaf Clason | Gustaf Nordenskiöld | Gustaf Mauritz Armfelt | Gustaf Dalén | Gustaf Cederström | Carl Gustaf von Rosen | Carl Gustaf af Leopold | Johan Gustaf Renat | Gustaf Wally | Gustaf von Paykull | Gustaf Skarsgård | Gustaf Retzius | Gustaf Philip Creutz | Gustaf Murray | Gustaf Molander | ''Gustaf Mauritz Armfelt'' standing next to the bust of Alexander I of Russia | Gustaf Komppa | Gustaf Kjellvander | Gustaf Johan Billberg | Gustaf Gründgens | Gustaf Carlson |
He is the son of the famous actor Willy Fritsch, and the outstanding actor and director Gustaf Gründgens advised 16 year old Thomas to take the profession of actor.