Sarah has had an extensive career on stage and was the original Bobbie in Mike Kenny's The Railway Children at York Theatre Royal. She transferred with the production to London Waterloo Station, where it won the Olivier Award for Best Entertainment (2011). She has also played Eliza Doolittle in Pygmalion (2005). Other theatre includes As You Like It, Forty Years On and an assortment of new writing including AgeSexLocation, Bloodtide and playing Natalie in James Phillips's City Stories which had a residency at St James Theatre London 2014-2015 (now The Other Palace). She transferred with the production to 59East59 Theater in New York as part of Brits Off Broadway (2016) and reprised the role at Crazy Coqs, Brasserie Zedel, London, in 2018.