Jill Cuthbertson is a British political aide. She has served as the acting Downing Street chief of staff alongside Vidhya Alakeson since February 2026, following the resignation of Morgan McSweeney. She has served as the deputy chief of staff since October 2024.
Cuthbertson worked as a private secretary to Gordon Brown and Ed Miliband. She worked for Cherie Blair. When Brown was prime minister she was manager of his Political Office. During the 2016 European Union membership referendum, she was events manager for the Britain Stronger in Europe campaign.
Until the 2024 United Kingdom general election, she was director of the private office of Keir Starmer. In the new Labour government she was appointed director of government relations. In October 2024, with the resignation of Sue Gray, she was promoted to deputy chief of staff by Morgan McSweeney.
On 8 February 2026, Cuthbertson was named joint acting Chief of Staff to the Prime Minister alongside Vidhya Alakeson, replacing McSweeney who had resigned following the Peter Mandelson-Jeffrey Epstein friendship scandal
Cuthbertson is married to Mo Hussein, a former special adviser to Home Secretary Amber Rudd. They met while working on the Remain campaign. They married in 2019.