David Lindon Lammy FRSA (born 19 July 1972) is a British politician who has served as Deputy Prime Minister of the United Kingdom, Secretary of State for Justice and Lord Chancellor since September 2025. He previously served as Foreign Secretary from July 2024 to September 2025. A member of the Labour Party, he has been Member of Parliament (MP) for Tottenham since 2000. Lammy previously held various junior ministerial positions under Tony Blair and Gordon Brown between 2002 and 2010.

Born in London, Lammy attended The King's School, Peterborough. He studied law at the School of Oriental and African Studies (SOAS), University of London and was called to the bar in 1994. He later studied for a Master of Laws degree at Harvard University, becoming the first black Briton to study at Harvard Law School. In 2000, Lammy briefly served in the London Assembly before being elected to Parliament in the 2000 Tottenham by-election. Tony Blair appointed him Parliamentary Under-Secretary of State for Public Health in 2002 and Parliamentary Under-Secretary of State for Constitutional Affairs in 2003. He was promoted to Minister of State for Culture in 2005. In 2007, Gordon Brown appointed him Parliamentary Under-Secretary of State for Innovation, Universities and Skills before Lammy served as Minister of State for Higher Education from 2008 to 2010.

Following Labour's defeat in the 2010 general election, Lammy endorsed David Miliband in the 2010 Labour leadership election and subsequently declined to serve in Ed Miliband's Shadow Cabinet. He then spent the next decade on the backbenches, and was a candidate in the 2015 London Labour Party mayoral selection but ultimately finished fourth. Lammy endorsed Keir Starmer in the 2020 Labour leadership election and was appointed Shadow Secretary of State for Justice and Shadow Lord Chancellor in Starmer's Shadow Cabinet. In the November 2021 Shadow Cabinet reshuffle, he was promoted to Shadow Foreign Secretary.

Following Labour's victory in the 2024 general election, Lammy returned to government after being appointed Foreign Secretary by Starmer in his ministry. As Foreign Secretary, Lammy helped negotiate the transfer of the Chagos Islands to Mauritius and several trade deals following the introduction of Donald Trump's tariffs. In the 2025 cabinet reshuffle, he was appointed Deputy Prime Minister, Justice Secretary and Lord Chancellor. He is the first person of colour to hold the position.

David Lindon Lammy was born on 19 July 1972 in Whittington Hospital in Archway, north London, to Guyanese parents David and Rosalind Lammy. He and his four siblings were raised solely by his mother after his father left the family when Lammy was 12 years old. Lammy has spoken about the importance of fathers and the need to support them in seeking to be active in the lives of their children. He chairs the All-Party Parliamentary Group on Fatherhood, and has written on the issue.

Lammy grew up in Tottenham, and went to Downhills Primary School. At the age of 10, he was awarded an Inner London Education Authority choral scholarship to sing at Peterborough Cathedral and attend The King's School, Peterborough.

Lammy studied at the School of Oriental and African Studies (SOAS), University of London, graduating with a 2:1 in law. He was called to the bar of England and Wales in 1994 at Lincoln's Inn. He went on to study at Harvard University, where he became the first black Briton to attend Harvard Law School; he studied for a Master of Laws degree and graduated in 1997.

After Harvard, Lammy was employed as an attorney at Howard Rice (now part of Arnold & Porter) in California from 1997 to 1998, and with D. J. Freeman (now part of Troutman Pepper Locke) from 1998 to 2000. He is a visiting professor of practice at SOAS.