Suggestions by @doiknowyoubro

Tilda Swinton

as Petunia Dursley in Harry Potter: The Limited Series

Jude Law

as Ludo Bagman in Harry Potter: The Limited Series

Tom Hiddleston

as Sir Cadogan in Harry Potter: The Limited Series

Jason Momoa

as Firenze in Harry Potter: The Limited Series

Matthew Gray Gubler

as Remus Lupin in Harry Potter: The Limited Series

Diego Velazquez

as Hannah Abbott in Genderswap Harry Potter

Jack Dylan Grazer

as Pansy Parkinson in Genderswap Harry Potter

Freddie Highmore

as Ted Tonks in Harry Potter and the next generation

Robin Williams

as Voice Actor in Best Actors Of All Time

Grace Saif

as Actresses. in The Most Attractive Celebrities

Nicholas Galitzine

as Viktor Krum in Harry Potter and the Goblet of Fire

Freddie Highmore

as Roger Davies in Harry Potter and the Goblet of Fire

Johnny Depp

as Sirius Black in Harry Potter and the Goblet of Fire

Emma Thompson

as Minerva McGonagall in Harry Potter and the Goblet of Fire

Toby Regbo

as Cedric Diggory in Harry Potter and the Goblet of Fire

Jason Maybaum

as Ron Weasley in Harry Potter and the Goblet of Fire

Alex Lawther

as Harry potter in Harry Potter and the Goblet of Fire

Sierra McCormick

as Lily Evans in The Marauders

Blake Michael

as Sirius Black in The Marauders

Sierra McCormick

as Young Lily in The Marauders