anniversary in
Washington, D.C., in 2022 at an event for
Barbie in 2023 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". 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. From 2012 to 2015, Pierce was posted to
Geneva as the UK's Permanent Representative to the United Nations and
other international organisations there. Until early 2018, she served as the FCO's Director General Political. In March 2018, Pierce became the
Permanent Representative of the United Kingdom to the United Nations in New York, the first woman to take on the role. During this time, Britain coordinated the Security Council's activities on
Myanmar. In 2020, Pierce moved to Washington, D.C., after being appointed as Britain's first female
ambassador to the United States. 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. 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. Trump had told Starmer he wanted to keep Pierce in place according to the
Sunday Times. Known for her flamboyance and colourful outfits, Pierce has made regular appearances on
Fox News and other US media. In February 2025, Pierce was named as the Prime Minister's Special Envoy to the Western
Balkans. ==Personal life==