Rufus Frederik Sewell (; born 29 October 1967) is an English actor. He has appeared in films such as Hamlet, The Woodlanders, Dangerous Beauty, Dark City, Bless the Child, A Knight's Tale, The Legend of Zorro, The Illusionist, The Holiday, Tristan and Isolde, Abraham Lincoln: Vampire Hunter, Hercules, Gods of Egypt, Martha, Meet Frank, Daniel and Laurence, and Judy. On television, he has starred in Victoria, Middlemarch, The Man in the High Castle, John Adams, Zen, The Pillars of the Earth, Parade's End, Killing Jesus, Charles II: The Power and The Passion, and Eleventh Hour. On stage, he originated the role of Septimus Hodge in Tom Stoppard's Arcadia and the role of Jan in Stoppard's Rock 'n' Roll, with the latter earning him an Olivier Award and a Tony Award nomination.
He is also known as Rufus Frederik Sewell.