Mark Williams
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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
Credits
Harry Potter and the Chamber of Secrets (2002)
as Arthur Weasley
Harry Potter and the Prisoner of Azkaban (2004)
as Arthur Weasley
Harry Potter and the Deathly Hallows: Part 2 (2011)
as Arthur Weasley
Harry Potter and the Goblet of Fire (2005)
as Arthur Weasley
Harry Potter and the Deathly Hallows: Part 1 (2010)
as Arthur Weasley
Harry Potter and the Order of the Phoenix (2007)
as Arthur Weasley
Harry Potter and the Half-Blood Prince (2009)
as Arthur Weasley
101 Dalmatians (1996)
as Horace
Stardust (2007)
as Billy
Harry Potter 20th Anniversary: Return to Hogwarts (2022)
as Self
Exit Wounds (2001)
as Cop
Shakespeare in Love (1998)
as Wabash
Early Man (2018)
as Barry (voice)
The Borrowers (1997)
as Exterminator Jeff
Agent Cody Banks 2: Destination London (2004)
as Inspector Crescent
Albert Nobbs (2011)
as Sean Casey
Dragon Fight (1989)
as Ray
A Cock and Bull Story (2005)
as Ingoldsby
Golden Years (2016)
as Phil
Prince of Jutland (1994)
as Aslak
Harry Potter: A History Of Magic (2017)
as Himself
50 Greatest Harry Potter Moments (2011)
as Arthur Weasley (archive footage)
Tumbledown (1988)
as Lumpy
The Look of Love (2013)
as Follies Director
When Harry Left Hogwarts (2011)
as Self
Robin and the Hoods (2024)
as The Mayor
Anita and Me (2002)
as The Reverend 'Uncle' Alan
Surprised by Oxford (2023)
as Professor Nuttham
High Heels and Low Lifes (2001)
as Tremaine
Red Top (2016)
as Police Commissioner Hamish Pritchard
Ted & Ralph (1998)
as Confirmed Bachelor
Lead Heads (—)
Actor
Hunting Venus (1999)
as Peter
The Final Curtain (2002)
as Declan Farrell
Dream Hacker (2025)
as Edgar Wainwright
Viva Blackpool (2006)
as Tommy Vesty
A Room with a View (2007)
as Mr Beebe
Fever (1994)
as Jukebox Man
Combat Sheep (2001)
as Moose (voice)
Dick Whittington: The ITV Pantomime (2002)
as King Rat
The Heart of Me (2004)
as Man
Privileged (1982)
as Wilf
Whatever Happened to Harold Smith? (2000)
as Roland Thornton
We're Going on a Bear Hunt (2016)
as Dad (voice)
The Big Game (1995)
as Tommy Hollis
The Secret Santa Project (2025)
as Leon
The Storyteller: Fearnot (1988)
as Fearnot's Brother
Suit You Sir! The Inside Leg Of The Fast Show (1999)
as Self
Heidi: Queen of the Mountain (2017)
as Henry
Coppers (1988)
Actor
Steve Coogan: The Inside Story (2009)
as Self
The Effects of Lying (2023)
Actor
Super Villans (2022)
as Self
The Fast Show Live (1998)
Actor
Second Star to the Left (2001)
as Duke (voice)
The Dark Channel (—)
as Mabuse
The Fast Show: The Farewell Tour (2003)
as Various
The Fast Show: More Blooming Catchphrases (2020)
as Self/Various Characters
Frankenstein's Wedding... Live in Leeds (2011)
as Alphonse Frankenstein
Happy Birthday Shakespeare (2000)
as Ted
Saxondale: On The Road (2006)
as Self