Oliver the Western Engine is an anthropomorphic steam engine in
The Railway Series books by the Rev. W. Awdry (and his son Christopher Awdry) and in the television adaptation Thomas & Friends. He is a Great Western 1400 Class tank engine who works on Duck's Branch Line ("The Little Western"), and lives on the Island of Sodor.
In addition, he has two ex-GWR Autocoaches (by the names of Isabel and Dulcie) and a GWR Brake Van by the name of Toad.