
Biography
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.
Filmography50+ titles

The Storyteller

Harry Potter and the Deathly Hallows: Part 2

Red Dwarf

Harry Potter and the Prisoner of Azkaban

Bottom

Merlin

Harry Potter and the Goblet of Fire

Agatha Christie's Marple

Harry Potter and the Deathly Hallows: Part 1

Harry Potter and the Half-Blood Prince

Harry Potter and the Order of the Phoenix

Hustle

Harry Potter and the Chamber of Secrets

Father Brown

Doctor Who

Chef!

Sense & Sensibility

Saxondale

Midsomer Murders

Harry Potter 20th Anniversary: Return to Hogwarts

Harry Potter: A History Of Magic

Stardust

New Tricks

Fantastic Friends

Blandings

Being Human

The Musketeers

Gormenghast

We're Going on a Bear Hunt

Shakespeare in Love

Sister Boniface Mysteries

Here We Go

Golden Years

Albert Nobbs

Tristram Shandy

Casualty

Surprised by Oxford

Early Man

The Heart of Me

High Heels and Low Lifes

Dream Hacker

The Borrowers

The Indian Doctor

Exit Wounds

101 Dalmatians

The Look of Love

Agent Cody Banks 2: Destination London

A Room with a View

Prince of Jutland

The One Show