Mark Williams
Acting
Mark Williams (born August 22, 1959) is an English actor, comedian, presenter and screenwriter. He first achieved widespread recognition as one of the central performers in the popular BBC sketch show The Fast Show. His film roles include Horace in the 1996 adaptation of 101 Dalmatians and Arthur Weasley in seven of the Harry Potter films. He made recurring appearances as Brian Williams in the BBC television series Doctor Who and as Olaf Petersen in Red Dwarf. Since 2013, Williams has portrayed the title character in the long-running BBC series loosely based on the Father Brown short stories by G. K. Chesterton.
Known for
2025Dream Hacker
Edgar Wainwright
2025The Secret Santa Project
Leon
2024Robin and the Hoods
The Mayor
2023The Effects of Lying
2023Surprised by Oxford
Professor Nuttham
2022Harry Potter 20th Anniversary: Return to Hogwarts
Self
2022Super Villans
Self
2020The Fast Show: More Blooming Catchphrases
Self/Various Characters
2018Early Man
Barry (voice)
2017Heidi: Queen of the Mountain
Henry
2017Harry Potter: A History Of Magic
Himself
2016Red Top
Police Commissioner Hamish Pritchard
2016We're Going on a Bear Hunt
Dad (voice)
2016Golden Years
Phil
2013The Look of Love
Follies Director
2011Harry Potter and the Deathly Hallows: Part 2
Arthur Weasley
2011Frankenstein's Wedding... Live in Leeds
Alphonse Frankenstein
2011When Harry Left Hogwarts
Self
2011Albert Nobbs
Sean Casey
201150 Greatest Harry Potter Moments
Arthur Weasley (archive footage)
2010Harry Potter and the Deathly Hallows: Part 1
Arthur Weasley
2009Harry Potter and the Half-Blood Prince
Arthur Weasley
2009Steve Coogan: The Inside Story
Self
2007Harry Potter and the Order of the Phoenix
Arthur Weasley
