Suggestions by @tatiyanawicks

Amir Wilson

as Fred Arthur Weasley in Harry Potter Next Generation

Eddie Redmayne

as Arthur Weasley in Marauders

Lilia Buckingham

as Dominique Gabrielle Weasley in Harry Potter Next Generation

Sabrina Carpenter

as Victoire Appoline Weasley in Harry Potter Next Generation

Lauren Orlando

as Molly Audrey Weasley II in Harry Potter Next Generation