Emilie Cocquerel plays as Sandy in The Letter for the King.
Emilie Cocquerel is the top #1 member of the cast and appears in 20 episodes.

Amir Ahmad Wilson (born 6 February 2004) is an English actor known for his roles as Will Parry alongside Dafne Keen in the HBO and BBC series His Dark Materials, Tiuri in the Netflix series The Letter for the King, and Dickon in the 2020 film adaptation of The Secret Garden.

Amir Wilson plays as Will Parry in The Letter for the King.
Amir Wilson is the top #2 member of the cast and appears in 15 episodes.

Nathanael Saleh plays as Azolan in The Letter for the King.
Nathanael Saleh is the top #3 member of the cast and appears in 8 episodes.

Ruby Ashbourne Serkis plays as Lavinia in The Letter for the King.
Ruby Ashbourne Serkis is the top #4 member of the cast and appears in 6 episodes.

Thaddea Graham is an actress and composer, known for Us (2020), The Letter for the King (2020) and Curfew (2019).

Thaddea Graham plays as Siobhán Wilson in The Letter for the King.
Thaddea Graham is the top #5 member of the cast and appears in 6 episodes.

Islam Bouakkaz plays as Arman in The Letter for the King.
Islam Bouakkaz is the top #6 member of the cast and appears in 6 episodes.

Jonah Lees plays as Jussipo in The Letter for the King.
Jonah Lees is the top #7 member of the cast and appears in 6 episodes.

Jack Barton plays as Foldo in The Letter for the King.
Jack Barton is the top #8 member of the cast and appears in 6 episodes.

Gijs Blom plays as Prince Viridian in The Letter for the King.
Gijs Blom is the top #9 member of the cast and appears in 6 episodes.

Peter Ferdinando is a British character actor, known for his work with filmmakers such as Ben Wheatley (A Field In England and High-Rise) and Gerard Johnson, his cousin (Tony and Hyena).

Peter Ferdinando plays as Jaro in The Letter for the King.
Peter Ferdinando is the top #10 member of the cast and appears in 6 episodes.