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.