Karen Pierce

Karen Pierce
Pierce in 2016
British Ambassador to the United States
In office
23 March 2020  2 February 2025
Monarchs
PresidentDonald Trump (2020–2021)
Joe Biden (2021–2025)
Donald Trump (2025)
Prime Minister
Preceded byThe Lord Darroch of Kew
Succeeded byThe Lord Mandelson
Permanent Representative of the United Kingdom to the United Nations
In office
23 March 2018  March 2020
MonarchElizabeth II
Prime Minister
Preceded byMatthew Rycroft
Succeeded byDame Barbara Woodward
British Ambassador to Afghanistan
In office
1 May 2015  29 February 2016
MonarchElizabeth II
Prime MinisterDavid Cameron
Preceded byRichard Stagg
Succeeded byDominic Jermey
Personal details
Born (1959-09-23) 23 September 1959
Preston, Lancashire, England
SpouseSir Charles Roxburgh
Children2
Education

Dame Karen Elizabeth Pierce, Lady Roxburgh, DCMG (born 23 September 1959), is a British diplomat who served as British Ambassador to the United States from March 2020 to February 2025.

She was previously the Permanent Representative of the United Kingdom to the United Nations from 2018 to 2020 and the British Ambassador to Afghanistan from 2015 to 2016. She was the first woman appointed to the United States and United Nations roles, and the second in the Afghanistan role.