Peter Vaughan is an English actor known for many supporting roles in a variety of British film and television productions. He has worked extensively on the stage, becoming known for roles such as police inspectors, Soviet agents and similar parts.
He is best known for his role as Grouty in the sitcom Porridge and he also had a recurring role alongside Robert Lindsay in Citizen Smith, written by John Sullivan.
He also had a major part as Tom Franklin in Chancer (1990–1991).
In latter years he is best known for his recurring role as Aemon, the maester at Castle Black and one of Lord Commander Jeor Mormont's closest advisers in the Night's Watch, in the fantasy drama television series Game of Thrones.