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.

1997 • TV

2005 • TV

2013 • TV

2008 • TV

2002 • Movie

2005 • Movie
as Arthur Weasley
as Arthur Weasley
as Arthur Weasley
as Arthur Weasley
as Arthur Weasley
as Arthur Weasley
as Arthur Weasley
as Wabash
as Billy
as Horace
as Ray
as The Mayor
as Tommy Vesty
as Peter
as Professor Nuttham
as Self
as Moose (voice)
as The Reverend 'Uncle' Alan
as Henry
as Jukebox Man
Writer
Writer
as Pat Everett
1 episodes
as Brian Williams
2 episodes
as Father Brown
140 episodes
as The Goblin (voice)
1 episodes
as Self - Host
1 episodes
as Commander Peters
1 episodes
as Self
1 episodes
as Des Jones
1 episodes
as Self
1 episodes
as Olaf Petersen
3 episodes
as Dale Ridley
1 episodes
as David Beaumont
1 episodes
as Roland Grogan
1 episodes
as Father Brown
1 episodes
as Pathologist
2 episodes
as Regus
2 episodes
as Fearnot's Brother
1 episodes
as Boris
1 episodes
1 episodes
46 episodes
Writer