Walter Sedlmayr was born in Münich. He acted in about 70 movies. He was loved by his audience very much, but nobody knew the real Sedlmayr. He always kept his private life very private, and it was revealed after his death that he was homosexual. He couldn't come out as a homosexual for different reasons, but the main reason was surely his reputation as a typical bavarian man.

When he was brutally killed in Münich, it was rumoured that a young prostitute could have killed him, but it was found out that two very close friends and business partners killed him. The people were shocked by the brutality of his senseless death.