Peter O'Shaughnessy OAM (5 October 1923 – 17 July 2013) was an Australian actor, theatre director, producer and writer who presented the work of playwrights ranging from Shakespeare, Shaw, Ibsen, Strindberg, Chekhov to modern dramatists, such as Ionesco, Pinter and Beckett. He acted as a mentor to and collaborator with comedian Barry Humphries in his early career. He attended Xavier College, Melbourne.