Siân Berry

Siân Berry
Official portrait, 2024
Member of Parliament
for Brighton Pavilion
Assumed office
4 July 2024
Preceded byCaroline Lucas
Majority14,290 (27.3%)
Co-leader of the Green Party
of England and Wales
In office
4 September 2018  1 October 2021
Serving with Jonathan Bartley (2018–2021)
DeputyAmelia Womack
Preceded byCaroline Lucas
Succeeded byCarla Denyer and Adrian Ramsay
Leader of the Greens in the London Assembly
In office
6 May 2016  19 October 2018
Leader
Preceded byJenny Jones
Succeeded byCaroline Russell
Principal Speaker of the Green Party
In office
24 November 2006  30 November 2007
Serving with Derek Wall
Preceded byCaroline Lucas
Succeeded byCaroline Lucas
Member of the London Assembly
for Londonwide
In office
6 May 2016  7 May 2024
Camden London Borough Councillor
for Highgate
In office
22 May 2014  20 October 2023
Preceded byMaya De Souza
Succeeded byLorna Jane Russell
Personal details
Born
Siân Rebecca Berry

(1974-07-09) 9 July 1974
Cheltenham, Gloucestershire, England
Political partyGreen Party of England and Wales
Alma materTrinity College, Oxford (MEng)
Websitesianberry.org.uk

Siân Rebecca Berry (/ʃɑːn/; born 9 July 1974) is a British politician who has served as the member of Parliament for Brighton Pavilion since July 2024, succeeding Caroline Lucas. She was a co-leader of the Green Party of England and Wales alongside Jonathan Bartley from 2018 to 2021, and was its sole leader from July to October 2021. From 2006 to 2007, she was one of the Green Party's principal speakers.

Berry was a member of the London Assembly (AM) from 2016 until she resigned in 2024, serving as a London-wide member elected under the additional member system. She also served as a Green Party councillor on Camden Council, representing Highgate until October 2023.