Suggestions by @mischief

Abigail Cowen

as Mary Jane Watson in Sinister Six Movie

Abigail Cowen

as Mary-Jane Watson in Spider-Man

Rooney Mara

as Liz Wilson in Garfield

Chloë Grace Moretz

as Rosalyn in Calvin and Hobbes

Anna Kendrick

as Calvin's Mom in Calvin and Hobbes

Harry Collett

as Moe in Calvin and Hobbes

Thomas Brodie-Sangster

as Calvin in Calvin and Hobbes

Judi Dench

as Miss Wormwood in Calvin and Hobbes

Anna Kendrick

as Rosalyn in Calvin and Hobbes

Lizzy Greene

as Rosalyn in Calvin and Hobbes

Mckenna Grace

as Susie Derkins in Calvin and Hobbes

Lupita Nyong'o

as Professor Sinestra in Harry Potter

Jason Isaacs

as Lucius Malfoy in Harry Potter

Alicia Vikander

as Andromeda Tonks in Harry Potter

Armie Hammer

as Ted Tonks in Harry Potter

Amiah Miller

as Gabrielle Delacour in Harry Potter

Elsie Fisher

as Gabrielle Delacour in Harry Potter

Aya Shalkar

as Cho Chang in Harry Potter

Holland Roden

as Marietta Edgecomb in Harry Potter

Samantha Rose Baldwin

as Marietta Edgecomb in Harry Potter