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