Michael Gambon has an acting career.
Sir Michael John Gambon ( born 19 October 1940 ) is an Irish-born English actor who has worked in theatre , television and film . Gambon has played the eponymous mystery writer protagonist in the BBC television serial The Singing Detective , Jules Maigret in the 1990s ITV serial Maigret , and Professor Albus Dumbledore in the final six Harry Potter films after the death of previous actor Richard Harris . He has won four BAFTA TV Awards and three Olivier Awards .