- Justin Fletcher - Thomas the Tank Engine, The Narrow Gauge & The Narrow Gauge: Video Game
- Jack Mozenrath - Thomas the Tank Engine: Video Game
Stepney is based on the real engine of the same name, an LB&SCR A1x Class "Terrier" 0-6-0T tank locomotive. Stepney was painted in the ochre locomotive livery of the LB&SCR.
Stepney is an honest, kind, and hard-working engine, who loves to work on his branchline. Stepney listens to advice all the time and he always learns a lesson.