Emily is a fictional anthropomorphic steam locomotive from the television series Thomas and Friends. She was the first female steam engine to be featured in the television series, and is the only female member of the "Steam Team", the eight core characters of the series. She is painted dark green, and has large driving wheels and a shiny brass safety valve cover.

When she first arrived on the Island of Sodor, she took Thomas's coaches Annie and Clarabel by mistake, much to Thomas' dismay. However after she rescued Thomas and Oliver from an accident, Thomas forgave her. Sir Topham Hatt (the "Fat Controller") rewarded her with two coaches of her own. From Season 8 onwards she has been depicted as a rather bossy character, which can make her difficult to work with at times. She is sometimes a "big sister" figure to the smaller engines like Thomas and Percy. She speaks with a Scottish accent.

Emily is the only member of the Steam Team who does not appear in the Railway Series, the books that form the basis of the television series. She was a relatively late addition to the TV series, arriving in Season 7.

In the more recent (CGI) stories, from Hero of the Rails onwards, Emily is voiced by Teresa Gallagher (UK) and Jules de Jongh (US).

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