• 
  Geoffrey Bayldon

  Magic Grandad
• 
  Peter Armitage

  Magic Grandad
• 
  Kristy Bruce

  Kimberley Chadwick
• 
  Georgi Fisher

  Gary Chadwick
• 
  Cheryl Hall

   Mrs. Chadwick / ... (3 episodes, 1993)
• 
  Tim Healy

  Magic Grandad
• 
  Nicholas Hoult

  Tom
• 
  Sam Kelly

  Magic Grandad

• 
  Michael Maloney

  Mr. Leyton
• 
  Jessica Mann

   Lily (3 episodes, 2001)
• 
  Miriam Margolyes

  Grandmama
• 
  Robert Morgan

   Photographer (3 episodes, 2001)
• 
  Trevor Peacock

  Magic Grandad
• 
  Sarah Huntley

  Mrs. Leyton
• 
  Toyah Gibbs

  Eliza Deakin

• 
  Scarlet Gee

   Scarlet / ... (3 episodes, 2003)
• 
  James Moreno

  Gary Chadwick
• 
  Georgina Hagen

   Nikki (3 episodes, 2001)
• 
  Owen Birch

   Grandad as a boy (3 episodes, 2001)