Suggestions by @thecastjacker

Simon Callow

as Charles Xavier in THE MUTANTS

Freema Agyeman

as Ororo Munroe in THE MUTANTS

Matt Berry

as Henry "Hank" McCoy in THE MUTANTS

Gal Gadot

as Emma Frost in Masters of Evil (MCU)

Simon Brodkin

as James Madrox in THE MUTANTS

Kara Tointon

as Celia St. James (Joven) in The Seven Husbands of Evelyn Hugo

Kara Tointon

as Belatrix Lenstrange in Harry Potter (HBO Max Series)

Rich Fulcher

as Wormtail in Harry Potter (HBO Max Series)

Tim Downie

as Professor Lupin in Harry Potter (HBO Max Series)

Susie Wokoma

as Professor Sprout in Harry Potter (HBO Max Series)

Noel Fielding

as Peeves the Poltergeist in Harry Potter (HBO Max Series)

Tracy-Ann Oberman

as Professor McGonagall in Harry Potter (HBO Max Series)

Kara Tointon

as Medusa in MCU Fantastic Four

Jemaine Clement

as Wizard in MCU Fantastic Four

Rachel Stevens

as Dazzler in MCU Fantastic Four

Matt Berry

as Nicholas Sweeney in MCU Fantastic Four

Damon Beesley

as Director in MCU Fantastic Four

Iain Morris

as Director in MCU Fantastic Four

Eddie Marsan

as Franklin Storm in MCU Fantastic Four

Hannah Spearritt

as Alicia Masters in MCU Fantastic Four