Emma Dumont as Euphemia 'Mia' Potter/Polaris
Rose Leslie as Aster Black née Evans /Voyant
Michael Fassbender as Erik Lensherr/Magneto
James McAvoy as Charles Xavier/Professor X
Timothée Chalamet as Regulus Black
Lorenzo Zurzolo as Theodore 'Theo' Nott
Tom Felton as Draco Malfoy
Scarlett Byrne As Pansy Parkinson
Louis Cordice As Blaise Zabini
Ashley Benson as Daphne Greengrass
The Phelps Twins as The Weasley Twins
The Rest of The Harry Potter Cast as Themselves.
The Rest of The X-Men Cast as Themselves.