Suggestions by @islington

Gaia Weiss

as Milady de Winter in The Three Musketeers

Devery Jacobs

as Jules Black in Life and Death: Twilight Re-imagined

Dylan Minnette

as Beaufort Swan in Life and Death: Twilight Re-imagined

Christine Adams

as Joyce Summers in Buffy the Vampire Slayer (Reboot/Remake)

Sendhil Ramamurthy

as Rupert Giles in Buffy the Vampire Slayer (Reboot/Remake)

Layla Crawford

as Dawn Summers in Buffy the Vampire Slayer (Reboot/Remake)

Lucky Blue Smith

as Spike in Buffy the Vampire Slayer (Reboot/Remake)

Olly Alexander

as Spike in Buffy the Vampire Slayer (Reboot/Remake)

Patrick Gibson

as Angel in Buffy the Vampire Slayer (Reboot/Remake)

Jack Reynor

as Angel in Buffy the Vampire Slayer (Reboot/Remake)

Nicole Muñoz

as Tara Maclay in Buffy the Vampire Slayer (Reboot/Remake)

Oscar Isaac

as Rupert Giles in Buffy the Vampire Slayer (Reboot/Remake)

Elena Kampouris

as Nadia Zhabin in The Grisha Trilogy

Laya DeLeon Hayes

as Dawn Summers in Buffy the Vampire Slayer (Reboot/Remake)

Bill Skarsgård

as Johnny Storm in The Fantastic Four

Andi Osho

as Joyce Summers in Buffy the Vampire Slayer (Reboot/Remake)

Erica Luttrell

as Joyce Summers in Buffy the Vampire Slayer (Reboot/Remake)

Elle Downs

as Joyce Summers in Buffy the Vampire Slayer (Reboot/Remake)

Jaylen Barron

as Buffy Summers in Buffy the Vampire Slayer (Reboot/Remake)

Diamond White

as Buffy Summers in Buffy the Vampire Slayer (Reboot/Remake)