
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 Prisoner of Azkaban (2004)
as Arthur Weasley

Harry Potter and the Goblet of Fire (2005)
as Arthur Weasley

Harry Potter and the Chamber of Secrets (2002)
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

Harry Potter and the Deathly Hallows: Part 2 (2011)
as Arthur Weasley

Harry Potter and the Deathly Hallows: Part 1 (2010)
as Arthur Weasley

101 Dalmatians (1996)
as Horace

Early Man (2018)
as Barry (voice)

Harry Potter 20th Anniversary: Return to Hogwarts (2022)
as Self

Stardust (2007)
as Billy

Shakespeare in Love (1998)
as Wabash

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

A Cock and Bull Story (2005)
as Ingoldsby

The Look of Love (2013)
as Follies Director

High Heels and Low Lifes (2001)
as Tremaine

The Fast Show: You Ain’t Seen These, Right? (1999)
Actor

The Heart of Me (2004)
as Man

Robin and the Hoods (2024)
as The Mayor

50 Greatest Harry Potter Moments (2011)
as Arthur Weasley (archive footage)

When Harry Left Hogwarts (2011)
as Self

Harry Potter: A History Of Magic (2017)
as Himself

Whatever Happened to Harold Smith? (2000)
as Roland Thornton

A Room with a View (2007)
as Mr Beebe

We're Going on a Bear Hunt (2016)
as Dad (voice)

The Final Curtain (2002)
as Declan Farrell

Prince of Jutland (1994)
as Aslak

Steve Coogan: The Inside Story (2009)
as Self

Red Top (2016)
as Police Commissioner Hamish Pritchard

Second Star to the Left (2001)
as Duke (voice)

The Fast Show: The Farewell Tour (2003)
as Various

Dream Hacker (2025)
as Edgar Wainwright

Anita and Me (2002)
as The Reverend 'Uncle' Alan

Dick Whittington: The ITV Pantomime (2002)
as King Rat

The Secret Santa Project (2025)
as Leon

Suit You Sir! The Inside Leg Of The Fast Show (1999)
as Self

Super Villans (2022)
as Self

Surprised by Oxford (2023)
as Professor Nuttham

Golden Years (2016)
as Phil

Tumbledown (1988)
as Lumpy

Saxondale: On The Road (2006)
as Self

The Fast Show: More Blooming Catchphrases (2020)
as Self/Various Characters

The Storyteller: Fearnot (1988)
as Fearnot's Brother

Viva Blackpool (2006)
as Tommy Vesty

The Fast Show Live (1998)
Actor

Frankenstein's Wedding... Live in Leeds (2011)
as Alphonse Frankenstein

The Effects of Lying (2023)
Actor

Heidi: Queen of the Mountain (2017)
as Henry

Hunting Venus (1999)
as Peter
The Big Game (1995)
as Tommy Hollis

Ted & Ralph (1998)
as Confirmed Bachelor

Coppers (1988)
Actor

The Dark Channel (2021)
as Mabuse

Combat Sheep (2001)
as Moose (voice)

Privileged (1982)
as Wilf
Happy Birthday Shakespeare (2000)
as Ted

Fever (1994)
as Jukebox Man
Lead Heads (—)
Actor

The Dudley Bug (—)
as Roderick the Palaeontologist





