Tom Hughes as Tom Marvolo Riddle.

Malfoy Family:

Harry Lloyd as Abraxas Malfoy

Imogen Poots as Lady Carmilla Malfoy née Poséy.

Cody Fern as Lord Balaurius Malfoy.

Lestrange:

Francisco Lachowski as Raddamanthus Lestrange

Tanya Reynolds as Lady Minette Lestrange née Rosier

Dan Stevens as Lord Corvus Lestrange

Rosier:

Lauren Cohen as Lady Violet Rosier.

Everleigh Rose Smith-Soutas as Durella Rosier.

Colin Firth as Lord Oleander Rosier

Josh Brodis as Felix Rosier

Avery:

Sean O'Pry as Alton Avery

Nicholas Hoult as Lord Ares Avery

Uma Thurman as Lady Eris Avery née Mulciber

Yaxley:

Chad Lindberg as Lord Lysander Yaxley

Sarah Gadon as Lady Hestia Yaxley née Nott

Darwin Gray as Corban Yaxley

Nott:

Tom Hiddleston as Thaddeus Nott

Douglas Neitzke as Lord Thoros Nott

Daneel Ackles as Lady Hera Nott nèe Avery

Mulciber:

Jonathan Rhys Meyers as Jonathan Mulciber

Tom Hardy as Lord Holmes Mulciber

Anna von Klinski as Lady Wilhelmina Mulciber née Dolohov.

Dolohov:

Ana Golja as Lady Annita Dolohov née Yaxley.

Jason Momoa as Lord Alfon Dolohov

Arben Bajraktaraj as Antonin Dolohov