Willa Holland as Calysta 'Cal' Potter

Daniel Radcliffe as Harry Potter

Evan Roderick as Jeff Evans

Blake Michael as Regulus Goldstein

Noen Eubanks as Felix Sanguini

James Maslow as Raymond Avery

Tom Felton as Draco Malfoy

Emma Watson as Hermione Granger

Rupert Grint as Ronald 'Ron' Weasley

Bonnie Wright as Ginny Weasley

Reece King as Blaise Zabini

{ The rest of the Harry Potter cast as themselves. Any additional characters will be mentioned at the beginning of the chapter }