- Mark Moraghan
- Narrator
- Ben Forster
- Mr. Perkins
- David Bedella
- Victor (UK & US)
- Jonnie Broadbent
- Bill and Ben (UK & US)
- Olivia Colman
- Marion (UK & US)
- Teresa Gallagher
- Emily (UK) / Annie and Clarabel (UK & US) / The Lady in the Big Hat (UK & US) / Passengers (UK & US) (voice)
- William Hope
- Toby (US)
- Steven Kynman
- Duck / Porter / Peter Sam (voice) (as Steve Kynman)
- Clive Mantle
- Gator (UK & US)
- David Menkin
- Porter (US)
- Joe Mills
- Oliver (UK & US) / Toad (UK & US) / The Bird Watcher (UK & US) (voice)
- Maggie Ollerenshaw
- Henrietta (UK & US)
- Kerry Shale
- Henry (US) / Gordon (US) / James (US) / Sir Topham Hatt (US) / Mr. Percival (US) / Workmen (US) (voice)
- Martin T. Sherman
- Thomas (US) / Percy (US) (voice) (as Martin T Sherman)
- Ben Small
- Thomas (UK) / Toby (UK) / Rheneas (UK & US) (voice)
- Tom Stourton
- Duncan (UK & US)
- Tim Whitnall
- Timothy (UK & US) / The Deputy Minister (UK & US) (voice)
- 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) / Thomas' Guard (UK & US) / The Grumpy Passenger (UK & US) / Workmen (UK & US) / Passengers (UK & US) (voice)
- Matt Wilkinson
- Spencer (UK & US) / Rusty (UK & US) / The Dock Manager (UK) / Workmen (UK & US) / The Man with the Hat (UK) (voice)
