Lucy Katherine Liemann Harman (born 24 November 1973) is an English actress. After graduation she was spotted at a supermarket by a voice scout who urged her to become a voice artist. Liemann then went on to study acting at the Academy of Live and Recorded Arts. She has worked in theatre, television and film.

Starting in stage productions, she starred in the initial London production of Carl Djerassi's play Phallacy in 2005.

After a series of roles in various standard British television shows, including The Bill and Agatha Christie's Poirot, she played the part of Lucy in the third part of the Jason Bourne film series, The Bourne Ultimatum.

Liemann played recurring character Sam Phillips in the television series Moving Wallpaper, and stars as Reggie Perrin's nubile colleague Jasmine Strauss in the BBC's 2009–10 reprises of the classic tales