- Sylvester McCoy - Thomas the Tank Engine
- Bill Nighy - Thomas the Tank Engine: Video Game, War on Sodor & War on Sodor: Video Game
- Nick Frost - The Pack
Oliver is based on a GWR 14xx 0-4-2T. Oliver is painted in the GWR's green livery with yellow lining, black wheels and a brass GWR numberplate on his cab side.
Oliver is considered brave and a good role model by the engines. This went to his smokebox and led to his incident with the ballast trucks, but Oliver has since then learned his lesson and started to behave like a real role model
- Andy Serkis was considered for Oliver's voice in The Pack.