Louisa Miranda Clein (born 1979 in Poole, Dorset) is a British actress. Her mother is a professional violinist, her sister is the cellist Natalie Clein and her cousin is the author Julia Pascal. Clein played viola as a youth and was a violist with the National Youth Orchestra of Great Britain in 1995-1996.
Clein is a 2000 graduate of the Drama Centre London. In 2001, she made her television debut as Charlie Deed in the BBC series Judge John Deed, which ran until 2007. She has also appeared in shows such as Holby City, Doctors and Casualty and played the role of Zelda Kay in Island at War in 2004.
Clein's theatre performances have included A Midsummer Night's Dream, My Children, My Africa! and The Lady from the Sea. Her performance as Hilda in The Lady from the Sea earned her second place in the Ian Charleson Award. Clein also received critical acclaim for her 2005 performance as Anna in The Rubinstein Kiss. In 2006, Clein assumed the role of the radical pianist Harriet Cohen in Dearest Tania scripted by Duncan Honeybourne. She performed in the Almeida Theatre's 2008 production of "Waste". In summer 2009, Clein performed in the Sylvia Plath play Three Women at the Edinburgh Festival. At the beginning of 2010, Clein toured in the Oscar Wilde play Lord Arthur Savile's Crime as Sybil Merton with Lee Mead as her leading man, Lord Arthur.
In 2002, Clein appeared with her sister Natalie at the Holocaust Memorial Day concert and read extracts from her cousin Julia Pascal's Holocaust Trilogy.
From July 2010, Clein starred in The Railway Children in the former Waterloo Eurostar Terminal in London., and more recently at the purpose built King's Cross Theatre in 2015.
Throughout 2015 and 2016, Louisa has starred in "City Stories" at both the St. James Theatre, London, and 59E59 Theaters in New York.