| Honorific Prefix: | The Right Honourable |
| The Lord Booth-Smith | |
| Office: | Downing Street Chief of Staff |
| Primeminister: | Rishi Sunak |
| Term Start: | 25 October 2022 |
| Term End: | 5 July 2024 |
| Predecessor: | Mark Fullbrook |
| Successor: | Sue Gray |
| Office1: | Special adviser to the Chancellor of the Exchequer |
| Chancellor1: | Rishi Sunak |
| Term Start1: | February 2020 |
| Term End1: | July 2022 |
| Office2: | Special adviser to the Prime Minister of the United Kingdom |
| Primeminister2: | Boris Johnson |
| Term Start2: | July 2019 |
| Term End2: | July 2020 |
| Birth Name: | Liam Booth-Smith |
| Birth Place: | Stoke on Trent, England |
| Partner: | Olivia Booth-Smith |
| Alma Mater: | Loughborough University |
Liam Booth-Smith, Baron Booth-Smith (born 1987), is a British political adviser who served as the Downing Street Chief of Staff under Prime Minister Rishi Sunak from October 2022 to July 2024. He previously served as Sunak's de facto chief of staff as head of the Joint Economic Unit during his chancellorship.[1]
Booth-Smith was born in 1987[2] in Stoke on Trent and was raised by a single mother.[3] He read politics and social policy at Loughborough University.[4]
Booth-Smith served as chief executive of the Localis think tank between 2016 and 2018, before serving as a special adviser to James Brokenshire as Secretary of State for Housing, Communities and Local Government between 2018 and 2019, where Rishi Sunak was a junior minister. In July 2019, Booth-Smith became a senior adviser to prime minister Boris Johnson upon his accession as prime minister. He had previously worked at the Policy Exchange think tank with a specialism in housing policy.
In February 2020, Booth-Smith became then-chancellor Sunak's de facto chief of staff as head of the Joint Economic Unit between 10 Downing Street and 11 Downing Street,[5] overseeing the Treasury's response to the COVID-19 pandemic.
Booth-Smith led Rishi Sunak's leadership campaign during the July–September 2022 Conservative Party leadership election, and again during the October 2022 Conservative Party leadership election.
Booth-Smith was appointed as Downing Street Chief of Staff in October 2022 after Rishi Sunak's accession as prime minister. He succeeded Mark Fullbrook.
In 2023 the New Statesman named him as the ninth most powerful figure in British Right-Wing Politics.[6]
In the 2024 Dissolution Honours, he was nominated for a life peerage.[7] He was created as Baron Booth-Smith on 21 August 2024.[8]
Booth-Smith is married to former special adviser Olivia Oates.[9]