- Mark Moraghan
- Narrator
- Ben Forster
- Mr. Perkins
- David Bedella
- Victor (UK & US)
- Jules de Jongh
- Emily (US)
- Teresa Gallagher
- Emily (UK) / Belle (UK & US) / Annie and Clarabel (UK & US) / Stephen Hatt (UK & US) / Bridget Hatt (UK & US) / The Passengers (UK & US) / The Children (UK & US) (voice)
- Bob Golding
- A Railway Inspector (UK & US)
- John Hasler
- Thomas (UK)
- William Hope
- Edward (US) / Toby (US) / Rocky (US) (voice)
- Steven Kynman
- Duck / Porter / Paxton (voice)
- Joseph May
- Thomas (US)
- David Menkin
- Stanley (UK & US) / Porter (US) (voice)
- Joe Mills
- Oliver (UK & US) / Toad (UK & US) (voice)
- Rebecca O'Mara
- Caitlin (UK & US)
- Maggie Ollerenshaw
- Henrietta (UK & US)
- Nigel Pilkington
- Percy (UK)
- Rob Rackstraw
- James (US) / Toby (UK) (voice)
- Christopher Ragland
- Percy (US) / Troublesome Trucks (UK & US) (voice)
- Kerry Shale
- Henry (US) / Gordon (US) / Diesel (UK & US) / Flynn (UK & US) / Harold (US) (voice)
- Tim Whitnall
- Reg (UK & US)
- Keith Wickham
- Edward (UK) / Henry (UK) / Gordon (UK) / James (UK) / Stafford (UK & US) / Salty (UK & US) / Bertie (UK & US) / Sir Topham Hatt (UK & US) / A Railway Inspector (UK & US) / The Wellsworth Stationmaster (UK & US) / The Sodor Search and Rescue Centre Worker (UK & US) / The Dock Workers (UK & US) / The Passengers (UK & US) (voice)
- Matt Wilkinson
- Spencer (UK) / Winston (UK & US) / Rocky (UK) / Cranky (UK) (voice)
- Glenn Wrage
- Spencer (US) / Cranky (US) (voice)
- Mike Grady
- Sir Robert Norramby (UK & US)