Ron Donachie (born 26 April 1956) is a Scottish actor. He is known for his supporting roles in films such as The Jungle Book and television series Doctor Who and Game of Thrones. He portrayed Thomas King (credited as the Master-at-arms) in James Cameron's 1997 film, Titanic.
Donachie was born in Dundee, Scotland as Ronald Eaglesham Porter. He was educated at Madras College, St. Andrews and Glasgow University, from where he graduated in English Literature and Drama in 1979.