Marcel Prawy (birth name: Marcel Horace Frydmann, Ritter von Prawy) (born 29 December 1911, in Vienna – died 23 February 2003, in Vienna) was an Austrian dramaturg, opera connoisseur and opera critic. He was born into a Jewish Austro-Hungarian noble family and studied law, but his life belonged to the opera. He became secretary of the tenor Jan Kiepura and they both emigrated to the United States when persecution of the Austrian Jews became unbearable in the late 1930s.