Suggestions by @rickdive

Dane DeHaan

as Prince Stavron Boragir in Dirge of the Dragons

Tom Glynn-Carney

as Lykos Celeson in Dirge of the Dragons

Mayan ElSayed

as Mercy Marigold in Dirge of the Dragons

Omar Rozik

as Chase Marigold in Dirge of the Dragons

Diego Boneta

as Giacomo Renard in Dirge of the Dragons

Fionn Whitehead

as Lykos Celeson in Dirge of the Dragons

Lili Reinhart

as Commodore Astrid Celeson in Dirge of the Dragons

Mena Massoud

as Prince Jodar Jovari in Dirge of the Dragons

Iman Vellani

as Mercy Marigold in Dirge of the Dragons

Adam Driver

as Corvus Vant in Dirge of the Dragons

Millie Gibson

as Princess Kerestalia Pendra in Dirge of the Dragons

Ian McKellen

as Taran Tura in Dirge of the Dragons

Hannah Waddingham

as General Typha Celeson in Dirge of the Dragons

Chappell Roan

as Iolanthe Tura in Dirge of the Dragons

Peter Capaldi

as Adric of Dondarrium in Dirge of the Dragons