- Mark Moraghan
- Narrator
- Mike Grady
- Sir Robert Norramby (UK & US)
- Ben Forster
- Mr. Perkins
- David Bedella
- Victor (UK & US)
- Jonnie Broadbent
- Slip Coach (UK & US)
- Jules de Jongh
- Emily (US) / The Little Boy (US) (voice)
- Jonathan Forbes
- Connor (UK & US)
- Teresa Gallagher
- Emily (UK) / The Little Boy (UK) / Passengers (UK & US) (voice)
- William Hope
- Edward (US) / Rocky (US) / The Dock Manager (US) (voice)
- Togo Igawa
- Hiro (UK & US)
- Steven Kynman
- Duck / Slip Coach (voice) (as Steve Kynman)
- Michael Legge
- Luke (UK & US)
- Clive Mantle
- Gator (UK & US)
- Joe Mills
- Oliver (UK & US)
- Rebecca O'Mara
- Slip Coach (UK & US)
- Kerry Shale
- Henry (US) / Gordon (US) / James (US) / Diesel (UK) / Sir Topham Hatt (US) / Mr. Percival (US) (voice)
- Martin T. Sherman
- Thomas (US) / Percy (US) / Diesel (US) (voice) (as Martin Sherman)
- Ben Small
- Thomas (UK) / Rheneas (UK & US) / Owen (UK & US) (voice)
- Tom Stourton
- Duncan (UK & US)
- Tim Whitnall
- Reg (UK & US)
- Keith Wickham
- Edward (UK) / Henry (UK) / Gordon (UK) / James (UK) / Percy (UK) / Salty (UK & US) / Skarloey (UK & US) / The Fat Controller (UK) / The Thin Controller (UK) / Gator's Driver (UK) / Steamworks Worker (UK) / Passengers (UK & US) (voice)
- Matt Wilkinson
- Rusty (UK & US) / Rocky (UK) / Cranky (UK) / The Dock Manager (UK) (voice)
- Glenn Wrage
- Cranky (US) / Gator's Driver (US) / Steamworks Worker (US) (voice)
