Edward Maurice Charles Marsan is an English actor. He won the London Film Critics Circle Award and National Society of Film Critics Award for Best Supporting Actor for the film Happy-Go-Lucky in 2008.

He has appeared in films such as Gangster No. 1 (2000), Ultimate Force (2002), V for Vendetta (2006), Mission: Impossible III (2006), Sixty Six (2006), Hancock (2008), Sherlock Holmes (2009), War Horse (2011), Sherlock Holmes: A Game of Shadows (2011), The Best of Men (2012), and The World's End (2013). He also appeared as Terry in Showtime's series Ray Donovan (2013–2020), and as Mr Norrell in the BBC drama Jonathan Strange & Mr Norrell (2015).