Karen Pierce

Her Excellency Dame Karen Pierce DCMG
Pierce in 2016
Ambassador of the United Kingdom to the United States
Incumbent
Assumed office 23 March 2020
Monarchs	Elizabeth II Charles III
Prime Minister	Boris Johnson Liz Truss Rishi Sunak Keir Starmer
Preceded by	The Lord Darroch of Kew
Permanent Representative of the United Kingdom to the United Nations
In office 23 March 2018 – March 2020
Monarch	Elizabeth II
Prime Minister	Theresa May Boris Johnson
Preceded by	Matthew Rycroft
Succeeded by	Dame Barbara Woodward
Ambassador of the United Kingdom to Afghanistan
In office 1 May 2015 – 29 February 2016
Monarch	Elizabeth II
Prime Minister	David Cameron
Preceded by	Richard Stagg
Succeeded by	Dominic Jermey
Personal details
Born	(1959-09-23) 23 September 1959 (age 65) Preston, Lancashire, England
Spouse	Charles Roxburgh
Children	2
Education	Girton College, Cambridge (BA) London School of Economics (MSc)

Dame Karen Elizabeth Pierce, Lady Roxburgh, DCMG (born 23 September 1959), is a British diplomat who has served as the British Ambassador to the United States since 2020.^[1]

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.^[2][3]

Pierce was born in Preston, Lancashire, where her grandparents were mill workers.^[4] Her father was an architectural draughtsman and her mother a secretary.^[5]

After attending Penwortham Girls' High School, a grammar school in Lancashire, she continued her studies at Girton College, Cambridge, where she received a Bachelor of Arts in English. In 2012 she was awarded a Master of Science in international strategy and diplomacy from the London School of Economics.^[6][7]

Pierce joined the Foreign and Commonwealth Office (FCO) in 1981, inspired by Margaret Thatcher's victory in the 1979 general election, which demonstrated to Pierce that women could "reach the top".^[5] After studying Japanese, she was posted to Tokyo in 1984. In 1987 she returned to London and joined the FCO's Security Policy Department. From 1992 to 1995 she worked in Washington, D.C., as Private Secretary to the British Ambassador to the United States, Robin Renwick. She held various positions at the FCO between 1996 and 2000, including Team Leader for Ukraine, Belarus and Moldova (1996−1997), Deputy Head of the Eastern Adriatic (Balkans) Department (1997−1999) and Head of the FCO Newsroom (1999−2000).^[8]

From 2006 to 2009 Pierce was the UK's Deputy Permanent Representative to the United Nations in New York. In this capacity, she acted as the President of the UN Security Council in April 2007 and in May 2008. From 2009 to 2012, she was Director for South Asia and Afghanistan at the FCO, acting as the UK Special Representative for Afghanistan and Pakistan from June 2010 to June 2011.^[9]

From 2012 to 2015 Pierce was posted to Geneva as the UK's Permanent Representative to the United Nations and other international organisations there.^[8] From May 2015 to February 2016 she was the British Ambassador to Afghanistan, the second woman to serve in that role.^[10] Until early 2018, she served as the FCO's Director General Political.^{[citation needed]}

Pierce became the Permanent Representative of the United Kingdom to the United Nations in New York in March 2018,^[11] the first woman to take on the role.^[12] During this time, Britain coordinated the Security Council's activities on Myanmar.^[13]

In 2020 Pierce moved to Washington, D.C., after being appointed as Britain's first female Ambassador to the United States.^[14] On 7 November 2024, following the 2024 United States presidential election, the Chancellor of the Duchy of Lancaster, Pat McFadden, announced that Pierce was doing "an excellent job" as ambassador, with the "full confidence of the British government", and would remain in Washington until after Donald Trump's inauguration in January 2025.^[15] Pierce is considered broadly popular across the political spectrum in the United States, with senior Republican campaign adviser Chris LaCivita, the co-campaign manager during Donald Trump's victorious 2024 presidential campaign, describing her as "professional universally-respected" and bemoaning her replacement.^[16]

Known for her flamboyance and colourful outfits, Pierce has made regular appearances on Fox News and other US media.^[5]

Pierce is married to Sir Charles Roxburgh, whom she met at the University of Cambridge and with whom she has two sons.^{[5][17][8][18]} Roxburgh was Second Permanent Secretary of the UK Treasury from 2016 until 2022, when he was made a Knight Commander of the Order of the Bath, at which point Pierce became Lady Roxburgh, although she does not use the title professionally.^[19]

Pierce was appointed Dame Commander of the Order of St Michael and St George (DCMG) in the 2018 Birthday Honours.^[20]