Suggestions by @banane

Ed Westwick

as Adrian Ivashkov in Vampire Academy

Score: -1

Helen Mirren

as Tatiana Ivashkov in Vampire Academy

Score: +1

Famke Janssen

as Natasha Ozera in Vampire Academy

Score: -1

Emma Stone

as Sydney Sage in Vampire Academy

Score: 0

Sasha Luss

as Lissa Dragomir in Vampire Academy

Score: +1

Millie Bobby Brown

as Jill Dragomir in Vampire Academy

Score: -1

Emeraude Toubia

as Emerie in A Court of Thorns and Roses

Score: -2

Liam Nesson

as Beron in A Court of Thorns and Roses

Score: -3

Riley Voelkel

as Ianthe in A Court of Thorns and Roses

Score: -9

Robert Downey Jr.

as Helion in A Court of Thorns and Roses

Score: -12

Danielle Campbell

as Elain in A Court of Thorns and Roses

Score: -1

Emma Dumont

as Amren in A Court of Thorns and Roses

Score: -12