Mark Williams
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.
112 acting credits
Acting · 112
Midsomer Murders
1997
Doctor Who
2005
Top of the Pops
1964
Casualty
1986
Father Brown
2013
The One Show
2006
Merlin
2008
Agatha Christie's Marple
2004
Peak Practice
1993
Harry Potter and the Chamber of Secrets
2002
Harry Potter and the Prisoner of Azkaban
2004
Hustle
2004
Harry Potter and the Goblet of Fire
2005
New Tricks
2004
Harry Potter and the Order of the Phoenix
2007
Red Dwarf
1988
Harry Potter and the Deathly Hallows: Part 2
2011
Harry Potter and the Half-Blood Prince
2009
Harry Potter and the Deathly Hallows: Part 1
2010
The Musketeers
2014
Loose Women
1999
Being Human
2009
Sister Boniface Mysteries
2022
The Storyteller
1988
101 Dalmatians
1996
Harry Potter 20th Anniversary: Return to Hogwarts
2022
Stardust
2007
Comedy Lab
1998
Sense and Sensibility
2008
Blandings
2013
Bottom
1991
Shakespeare in Love
1998
Chef
1993
The Fast Show
1994
Shackleton
2002
Here We Go
2022
Saxondale
2006
Early Man
2018
The Indian Doctor
2010
Little Crackers
2010
Exit Wounds
2001
Gormenghast
2000
Harry Enfield and Chums
1994
Fantastic Friends
2022
The Borrowers
1997
Agent Cody Banks 2: Destination London
2004
Happiness
2001
The Strangerers
2000
Fun at the Funeral Parlour
2001
99-1
1994
The Rotters' Club
2005
Albert Nobbs
2011
Alexei Sayle's Stuff
1988
Dragon Fight
1989
The Smell of Reeves and Mortimer
1993
When Harry Left Hogwarts
2011
Great Expectations
1989
Harry Potter: A History Of Magic
2017
Industrial Revelations
2002
The Look of Love
2013
Prince of Jutland
1994
A Cock and Bull Story
2005
Robin and the Hoods
2024
Anita and Me
2002
Mark Williams On The Rails
2004
Star
2003
High Heels and Low Lifes
2001
KYTV
1989
Golden Years
2016
Tumbledown
1988
50 Greatest Harry Potter Moments
2011
Merlin of the Crystal Cave
1991
A Room with a View
2008
The Secret Santa Project
2025
Carrie and Barry
2004
Surprised by Oxford
2023
Coppers
1988
A Room with a View
2007
Dream Hacker
2025
The World's Strangest UFO Stories
2006
Whatever Happened to Harold Smith?
2000
The Heart of Me
2004
Hunting Venus
1999
Privileged
1982
The Big Game
1995
Viva Blackpool
2006
Combat Sheep
2001
Frankenstein's Wedding... Live in Leeds
2011
Dick Whittington: The ITV Pantomime
2002
Born Naughty?
2015
Suit You Sir! The Inside Leg Of The Fast Show
1999
The Final Curtain
2002
Fern
2011
We're Going on a Bear Hunt
2016
Jumpers for Goalposts
2001
Ted & Ralph
1998
Red Top
2016
Happy Birthday Shakespeare
2000
Mark Williams' Big Bangs
—
Steve Coogan: The Inside Story
2009
Fever
1994
The Storyteller: Fearnot
1988
The Effects of Lying
2023
Lead Heads
—
The Fast Show Live
1998
Second Star to the Left
2001
The Fast Show: The Farewell Tour
2003
The Dark Channel
—
Heidi: Queen of the Mountain
2017
Super Villans
2022
The Fast Show: More Blooming Catchphrases
2020
Saxondale: On The Road
2006