Hildebrandt was born in Bunzlau, Lower Silesia, Weimar Germany where he attended school. In World War II he became a Flakhelfer of the Luftwaffe but after four months was conscripted to the German Wehrmacht, in the same role. In June 2007, a year after the Günter Grass Waffen-SS revelations, documents were released which showed that some prominent German intellectuals like Siegfried Lenz, Martin Walser and Dieter Hildebrandt had been members of the Nazi Party. For all three the documents showed their membership at a young age, during a late stage of the fascist regime in Germany – Hildebrandt's application was dated 19 February 1944 and he was admitted on 20 April 1944, Hitler's 55th birthday. Both Lenz and Hildebrandt said they were unaware of having written an application, and unaware that they became a member of the Nazi Party in 1944. Historians like Norbert Frei and Götz Aly said in that context that some local Nazi party leaders might have written mass applications to the party without the knowledge of the supposed applicants. On 8 May 1945, Hildebrandt was taken captive by the United States Army, but was released a few months later. In the years after the war, Hildebrandt finished his schooling and moved to Windischeschenbach in Bavaria. In 1948 he started studying theatre sciences in Munich. During that time he founded a student-performed cabaret show, "Die Namenlosen", in Schwabing. After finishing his studies Hildebrandt worked with Sammy Drechsel to found and develop the Münchner Lach- und Schießgesellschaft, a successful kabarett where he worked alongside cabaret artists such as Klaus Havenstein and Bruno Jonas. He stopped working with Drechsel in 1972, to work for radio and TV stations. From 1973 until 1979 Hildebrandt was the presenter and author of the cabaret show "Notizen aus der Provinz", which was broadcast by ZDF. In 1980 his show "Scheibenwischer" first aired on the SFB, and remained on the air until 2003. In 1974 Hildebrandt, together with Werner Schneyder, started the "Autorenkabarett". This project lasted until 1982. Hildebrandt was married to Irene Mendler from 1956 until her death in 1985. They had two daughters, Ursula and Jutta. He married German actress Renate Küster in 1992. Hildebrandt died in Munich on 20 November 2013. Just a few days earlier it had become public that he had cancer, something Hildebrandt himself apparently had known since the summer.
