Suggestions by @alan01

Ethan Hawke

as Charlie Bartlett in The Clatter

Jennifer Yuh Nelson

as Director in A Lonely Creature

John Williams

as Composer in A Lonely Creature

Scott Frank

as Writer in A Lonely Creature

Maggie Smith

as Cora Noble in A Lonely Creature

Anthony Hopkins

as Frank Howard in A Lonely Creature

Mina Yasmin Bremseth Asheim

as Isabel Chrzanowski in A Lonely Creature

Samuel Leakey

as Oliver Byrne in A Lonely Creature

Lonely Creature

as Lonely Creature/ Timothy in A Lonely Creature

Catherine Clinch

as Lily Woods in A Lonely Creature

Savannah Liles

as Annie Woods in A Lonely Creature

Christopher Young

as Composer in Siren Head

Fede Álvarez

as Writer in Siren Head

Frank Darabont

as Director in Siren Head

Caleb McLaughlin

as Martin Wakefield in Siren Head

Tye Sheridan

as Jamie Northcott in Siren Head

Maria Bakalova

as Samantha Reid in Siren Head

Georgie Henley

as Lena Graham in Siren Head

Sirenhead

as Siren Head in Siren Head

Mark Korven

as Composer in The Lamb