Suggestions by @mischief

Oliver Phelps

as Fred Weasley in Harry Potter

Tom Holland

as Neville Longbottom in Harry Potter

Lili Reinhart

as Hannah Abbott in Harry Potter

Tara Sutaria

as Parvati and Padma in Harry Potter

Thomas Brodie-Sangster

as Collin Creevey in Harry Potter

Katherine McNamara

as Lily Evans in Harry Potter

Dan Stevens

as Draco Malfoy in Harry Potter

Elle Fanning

as Luna Lovegood in Harry Potter

Abigail Cowen

as Ginny Weasley in Harry Potter

Leo Flanagan

as Ron Weasley in Harry Potter

Asa Butterfield

as Harry Potter in Harry Potter

Emma Watson

as Hermione Granger in Harry Potter

Rupert Grint

as Ron Weasley in Harry Potter

Zendaya

as Hermione Granger in Harry Potter

Vanessa Morgan

as Hermione Granger in Harry Potter

Daniel Radcliffe

as Harry Potter in Harry Potter

Elle Fanning

as TInker Bell in Tinker Bell

Willem Dafoe

as Marvolo Gaunt in Voldemort : Origins

Brenton Thwaites

as Tom Riddle Sr. in Voldemort : Origins

Mackenzie Foy

as Merope Gaunt in Voldemort : Origins