Name	Known for
George Winter Merlin Merlin See fewer	Scum (1979)
Thomas Lambert Merlin the child Merlin the child See fewer	Merlin of the Crystal Cave (1991)
Roger Alborough Uther Uther See fewer	Velvet Goldmine (1998)
Robert Powell Ambrosius Ambrosius See fewer	The Italian Job (1969)
Trevor Peacock Ralf Ralf See fewer	Fred Claus (2007)
Sam Hails Arthur Arthur See fewer	Merlin of the Crystal Cave (1991)
Benedick Blythe Camlach Camlach See fewer	The King's Man (2021)
John Phillips King Dafydd King Dafydd See fewer	Village of the Damned (1960)
Kim Thomson Ninianne Ninianne See fewer	The Tall Guy (1989)
Sam Dastor Alun Alun See fewer	The Life and Death of Peter Sellers (2004)
Betty Marsden Moravic Moravic See fewer	Carry on Camping (1969)
Don Henderson Galapas Galapas See fewer	Star Wars: Episode IV - A New Hope (1977)
Mark Williams Cerdic Cerdic See fewer	Harry Potter and the Goblet of Fire (2005)
Hefin Clarke Dinias Dinias See fewer	Merlin of the Crystal Cave (1991)
Mark Collingwood King Gorian of Lanascol King Gorian of Lanascol See fewer	She-Wolf of London (1990)
Jonathan Copestake Messenger Messenger See fewer	EastEnders (1985)
Julie Neubert Queen Olwen Queen Olwen See fewer	Doomwatch (1970)
Leslie Mills Warlord (uncredited) Warlord (uncredited) See fewer	House of Salem (2016)