Ralf Sauer (6 July 1930 – 2 March 2020), better known as Peter Wieland, was a German singer and actor. He was born in Stralsund. He was very popular in East Germany or the GDR. After the fall of the GDR, Wieland appeared on television programs, such as "Sommermelodien", "Weihnachten bei uns" and "Gute Zeiten, schlechte Zeiten". In 1999 and 2000, he played the role of Franz Joseph in the operetta "The White Horse Inn".