John Light (born 30 September 1973) is an English actor.
His theatre performances include the Complete Works Festival in Stratford-upon-Avon, where he starred in Sean Holmes' Julius Caesar as Brutus and in Rupert Goold's The Tempest as Caliban. He appeared as Henry Lennox (with Richard Armitage and Daniela Denby-Ashe) in the BBC production North and South from the novel by Elizabeth Gaskell. He played the title character (the son of Rudyard Kipling) in My Son John.
He portrayed British pilot Robert Newman in the German film Dresden, in which he spoke German and played Geoffrey, Duke of Brittany in the 2003 film The Lion in Winter alongside Patrick Stewart, Glenn Close and Jonathan Rhys-Meyers. He played a fallen angel in two films released in 2005 which were titled The Prophecy: Uprising and The Prophecy: Forsaken. He also appeared in the title role of the 2009 play A New World: A Life of Thomas Paine.