He has appeared in numerous high-profile films, including Terry Gilliam's The Brothers Grimm and Brazil, A Knight's Tale, Martin Scorsese's Gangs of New York, Roman Polanski's Pirates, Peter Greenaway's The Cook, the Thief, His Wife & Her Lover, Woody Allen's You Will Meet a Tall Dark Stranger and Olivier Dahan's Grace of Monaco.
On his character, Mace Tyrell, Ashton Griffiths says: "Well, Mace is described variably by others as an oaf; the Lord of Oaf. However, in my view he's rather a wise old cookie, and is just bumbling along."
|Season four credits|
|Two Swords||The Lion and the Rose||Breaker of Chains||Oathkeeper||First of His Name|
|The Laws of Gods and Men||Mockingbird||The Mountain and the Viper||The Watchers on the Wall||The Children|
|Season five credits|
|The Wars to Come||The House of Black and White||High Sparrow||Sons of the Harpy||Kill the Boy|
|Unbowed, Unbent, Unbroken||The Gift||Hardhome||The Dance of Dragons||Mother’s Mercy|