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