Mark Williams (born 22 August 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
Harry Potter and the Prisoner of Azkaban
(2004)
Arthur Weasley
Harry Potter and the Chamber of Secrets
(2002)
Arthur Weasley
Harry Potter and the Half-Blood Prince
(2009)
Arthur Weasley
Harry Potter and the Goblet of Fire
(2005)
Arthur Weasley
Harry Potter and the Order of the Phoenix
(2007)
Arthur Weasley
Harry Potter and the Deathly Hallows: Part 2
(2011)
Arthur Weasley
Harry Potter and the Deathly Hallows: Part 1
(2010)
Arthur Weasley
101 Dalmatians
(1996)
Horace
Harry Potter 20th Anniversary: Return to Hogwarts
(2022)
Self
Stardust
(2007)
Billy
Shakespeare in Love
(1998)
Wabash
Exit Wounds
(2001)
Cop
Early Man
(2018)
Barry (voice)
Agent Cody Banks 2: Destination London
(2004)
Inspector Crescent
The Borrowers
(1997)
Exterminator Jeff
Albert Nobbs
(2011)
Sean Casey
Full Filmography
Acting
Privileged
(1982)
Wilf
Coppers
(1988)
Tumbledown
(1988)
Lumpy
Dragon Fight
(1989)
Ray
Royal Deceit
(1994)
Aslak
Fever
(1994)
Jukebox Man
The Big Game
(1995)
Tommy Hollis
101 Dalmatians
(1996)
Horace
The Borrowers
(1997)
Exterminator Jeff
Shakespeare in Love
(1998)
Wabash
The Fast Show Live
(1998)
Hunting Venus
(1999)
Peter
Suit You Sir! The Inside Leg Of The Fast Show
(1999)
Himself
Whatever Happened to Harold Smith?
(2000)
Roland Thornton
Happy Birthday Shakespeare
(2000)
Ted
High Heels and Low Lifes
(2001)
Tremaine
Second Star to the Left
(2001)
Duke (voice)
Combat Sheep
(2001)
Moose (voice)
Exit Wounds
(2001)
Cop
Anita and Me
(2002)
The Reverend 'Uncle' Alan
The Final Curtain
(2002)
Declan Farrell
Harry Potter and the Chamber of Secrets
(2002)
Arthur Weasley
Dick Whittington: The ITV Pantomime
(2002)
King Rat
The Fast Show: The Farewell Tour
(2003)
Various
Harry Potter and the Prisoner of Azkaban
(2004)
Arthur Weasley
Agent Cody Banks 2: Destination London
(2004)
Inspector Crescent
Harry Potter and the Goblet of Fire
(2005)
Arthur Weasley
A Cock and Bull Story
(2005)
Ingoldsby
Viva Blackpool
(2006)
Tommy Vesty
Harry Potter and the Order of the Phoenix
(2007)
Arthur Weasley
Stardust
(2007)
Billy
A Room with a View
(2007)
Mr Beebe
Harry Potter and the Half-Blood Prince
(2009)
Arthur Weasley
Steve Coogan: The Inside Story
(2009)
Self
Harry Potter and the Deathly Hallows: Part 1
(2010)
Arthur Weasley
Harry Potter and the Deathly Hallows: Part 2
(2011)
Arthur Weasley
Frankenstein's Wedding... Live in Leeds
(2011)
Alphonse Frankenstein
Albert Nobbs
(2011)
Sean Casey
50 Greatest Harry Potter Moments
(2011)
Arthur Weasley (archive footage)
When Harry Left Hogwarts
(2011)
Self
The Look of Love
(2013)
Follies Director
Red Top
(2016)
Police Commissioner Hamish Pritchard
We're Going on a Bear Hunt
(2016)
Dad (voice)
Golden Years
(2016)
Phil
Harry Potter: A History Of Magic
(2017)
Himself
Heidi: Queen of the Mountain
(2017)
Henry
Early Man
(2018)
Barry (voice)
Harry Potter 20th Anniversary: Return to Hogwarts
(2022)
Self
Super Villans
(2022)
Self
Surprised by Oxford
(2023)
Professor Nuttham
The Effects of Lying
(2023)
Smoke Out
(2024)
Tommy
Writing
Crew