Dame Maggie Smith as Headmistress Minerva McGonagall.

Helen Mirren as Deputy Headmistress Flora Fortescue.

Audrey Fleurot as Roxanne Evans - Muggle Studies Professor Years 1-4. (In the summer she still runs her Flower Shop). Muggle Studies is now compulsory for all Magic-Raised.

Luke Evans as Lyle Evans - Muggle Studies Professor Years 5-7. (In the summer he is still a part-time lawyer). Muggle Studies is now compulsory for all Magic-Raised.

Thomas Brodie-Sangster as Frank Longbottom- Head of Gryffindor.

Sarah Hyland as Katy Una Johnson - Head of Hufflepuff.

Warwick Davies as Filius Flitwick - Head of Ravenclaw.

Jim Broadbent as Horace Slughorn - Head of Slytherin.

Aidan Turner as Ross Davies - Charms Professor

Zoë Wanamaker as Madam Rolanda Hooch - Flying Instructor and Quidditch Referee.

Gwyneth Paltrow as Charity Platt - Potions Professor.

Adelomiwa Edwn as Tony Cox - Transfiguration Professor.

Miriam Margolyes as Pomona Sprout - Herbology Professor.

Ashleigh Murray as Bathsheda Babbling - Ancient Runes Professor.

Dichen Lachman as Septima Vecotr - Arithmancy Professor.

Andrew Garfield as Remus Lupin - Defence Against the Dark Arts Professor.

James Franco as Tyler Miller - Alchemy Professor.

Uli Latukefu as Brian Douglas - History and Government Professor.

Zhang Ziyi as Janelle Del-Ray - Wizarding Etiquette and Society Professor (Compulsory for ALL Muggle-Raised students).

Alex Meraz as Paul Chaske - Duelling and Martial Arts Instructor.