Sarah Gillett CMG CVO (born 21 July 1956) is a British former diplomat who was British Ambassador to Norway from July 2014 to 2018.

She previously served as Ambassador to Switzerland and Liechtenstein from 2009 to 2013.

[1] She joined the Diplomatic Service in 1976 and served at Washington, D.C., Paris, Los Angeles, Brasília, Montreal and at the Foreign and Commonwealth Office (FCO).

She was Vice-Marshal of the Diplomatic Corps and Director of Protocol at the FCO 2006–09, and Ambassador to Switzerland and concurrently to Liechtenstein 2009–13.

[3] Gillett was appointed MVO in 1986,[4] CMG in the 2009 Birthday Honours[5] and raised to CVO in December 2009 at the end of her appointment as Vice-Marshal of the Diplomatic Corps.