Thomas Geoffrey Wilkinson (February 5, 1948 – December 30, 2023) was an English actor. Known for his roles on stage and screen, he received numerous accolades including a BAFTA Award, a Golden Globe Award, and a Primetime Emmy Award as well as nominations for two Academy Awards and two Laurence Olivier Awards. In 2005, he was made an Officer of the Order of the British Empire (OBE).

Wilkinson trained at the Royal Academy of Dramatic Art before making his West End debut portraying Horatio in Hamlet (1980) for which he received a nomination for the Laurence Olivier Award for Best Actor in a Supporting Role. He returned to the West End playing Dr. Stockmann in the Henrik Ibsen play An Enemy of the People (1988) receiving a Laurence Olivier Award for Actor of the Year in a Revival nomination.