(in credits order)
- John Cleese(voice)
- Stephen Fry(voice)
- Ben Kingsley(voice) (as Sir Ben Kingsley)
- Simon Pegg(voice)
- Adjoa Andoh(voice)
- Adrian Bower(voice)
- Andrew Buchan(voice) (as Andy Buchan)
- Josh Cohen(voice)
- David de Keyser(voice) (as David De Keyser)
- Neil Grainger(voice)
- Sarah Hadland(voice)
- Adam Howden(voice)
- Rufus Jones(voice)
- Lewis Macleod(voice)
- Joseph Millson(voice)
- Alec Newman(voice)
- Damian O'Hare(voice)
- Stuart Organ(voice)
- Josette Simon(voice)
- Simon Williams(voice)
- Troy Baker(voice)
Rest of cast listed alphabetically
- Nicholas Boulton(voice) (uncredited)
