• 
  Bella Ramsey

  Mildred Hubble
• 
  Amanda Holden

  dra. Pentangle
• 
  Philip Martin Brown

   Professor Rowan Webb (9 episodes, 2017)
• 
  Meibh Campbell

  Maud Spellbody
• 
  Tamara Smart

  Enid Nightshade
• 
  Jenny Richardson

  Ethel Hallow
• 
  Raquel Cassidy

  Miss Hardbroom
• 
  Wendy Craig

   Miss Bat (7 episodes, 2017-2018)

• 
  Clare Higgins

  Miss Cackle
• 
  Shauna Shim

  Miss Drill
• 
  Tallulah Milligan

  Drusilla Paddock
• 
  Miriam Petche

   Esmerelda Hallow (8 episodes, 2017-2018)
• 
  Dagny Rollins

   Felicity Foxglove (8 episodes, 2017-2018)
• 
  Nicola Stephenson

  11 episodes, 2017-2018
• 
  Megan Hughes

  13 episodes, 2018

• 
  Trixie Hyde

  13 episodes, 2018
• 
  Kitty Slack

  13 episodes, 2018
• 
  Ynez Williams

  13 episodes, 2018
• 
  Kacey Ainsworth

  12 episodes, 2017
• 
  Zita Sattar

  22 episodes, 2017-2020
• 
  Annette Hannah

   Mabel Tapioca
• 
  Lydia Page

  Mildred Hubble