Suggestions by @deanyn

Aimee-Ffion Edwards

as Vivacia in Liveship Trilogy (Ship of Magic/The Mad Ship/Ship of Destiny)

Tom Hiddleston

as Kennit in Liveship Trilogy (Ship of Magic/The Mad Ship/Ship of Destiny)

Freya Allan

as Malta Vestrit in Liveship Trilogy (Ship of Magic/The Mad Ship/Ship of Destiny)

Christoph Waltz

as The Consul in Hyperion Cantos

Benedict Cumberbatch

as The Other in Piranesi

Anupam Tripathi

as Piranesi in Piranesi

henry cavill (young)

as Henry Winter in The Secret History

Jim Broadbent

as Julian Morrow in The Secret History

Neil Newbon

as Ulaam in Tress of the Emerald Sea

Tilda Swinton

as Sorceress in Tress of the Emerald Sea

Elle Fanning

as Tress in Tress of the Emerald Sea

Robert Downey Jr.

as Hoid in Tress of the Emerald Sea

Skandar Keynes

as Charlie in Tress of the Emerald Sea