Suggestions by @leopietro

Gerard Butler

as Wolverine in The Wolverine (2013)

Stanley Kubrick

as Director in Napoleon(1993)

Harry Styles

as Commodus in Almost Cast: Gladiator

Pedro Pascal

as Maximus Decimus Meridius in Almost Cast: Gladiator

Robert De Niro

as Batman in The Dark Knight Trilogy (1975-1982)

Geena Davis

as Zhora Salome in Blade Runner (1992)

Heather Graham

as Pris in Blade Runner (1992)

Nicole Kidman

as Rachael in Blade Runner (1992)

Gary Oldman

as Roy Batty in Blade Runner (1992)

Kevin Costner

as Rick Deckard in Blade Runner (1992)

Glen Powell

as Adam Young in Taylor Swift Biopic!

Ben Affleck

as Sapper Morton in Blade Runner 2049 (2017)

Dacre Montgomery

as Alexander the Great in Perfect Biopic casting

Ian McKellen

as Mr Woodhouse in Emma (2010)

Emma Thompson

as Miss Bates in Emma (2010)

Christina Ricci

as Jane Fairfax in Emma (2010)

Carey Mulligan

as Harriet Smith in Emma (2010)

Amanda Seyfried

as Emma Woodhouse in Emma (2010)

Sam Claflin

as George Knightley in Emma (2010)

Jonathan Bailey

as Frank Churchill in Emma (2010)