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

Timothee 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

Sam Heughan as Charlie Weasley

The Rest of The Harry Potter Cast as Themselves
The Rest of The X-Men Cast as Themselves.