Michelle Claire Ryan (born 22 April 1984) is an English actress.

She is known for portraying the role of Zoe Slater on the BBC soap opera EastEnders. In 2007, she starred in the short lived revival of the American television series Bionic Woman. She has appeared as the evil sorceress Nimueh in the 2008 BBC TV series Merlin, and as Lady Christina de Souza in the Doctor Who episode "Planet of the Dead".
Michelle Ryan was born in Enfield, Greater London, and was a student at Chace Community School. A member of a local theatre group since she was 10, she was picked for her role in EastEnders when she was 15 and first appeared on the show in September 2000; for the part, she affected an East End cockney accent, rather than speaking her usual Received Pronunciation.She left the series in late 2005 and has since stated that she has no intention of returning to EastEnders.
Ryan got her first big break playing Sheylla Grands in the series TV show Chosen Ones in the 1st season and Zoe Slater in the BBC soap EastEnders.

During summer 2005, Ryan appeared in a run of Who's the Daddy? at the King's Head Theatre. The play by Toby Young and Lloyd Evans is based on the David Blunkett paternity case.

Ryan had a small role in an episode of Marple which screened in February 2006, and also appeared in a small independent film the same year, Cashback.
In early 2007, Ryan was seen as Maria in Mansfield Park opposite Billie Piper for ITV and also as Lila in the film I Want Candy, co-starring Carmen Electra and Mackenzie Crook. In February 2007, it was announced that she had been cast as the lead in the new drama Bionic Woman.[5] The series began airing in the United States on the broadcast network NBC in September 2007. Ryan affects an American accent for the role of Jaime Sommers, except in the episode "The Education of Jaime Sommers" in which her character goes undercover as an English transfer student at a university; for this episode, she uses an Oxfordshire accent instead of her natural London accent. She has had professional dance training and attributes to it helping her with the physically demanding stunts required for the show. She also learned Krav Maga and sign language for the part (the latter because, as originally conceived, Ryan's character was to have had a hearing impaired sister, but this story element was abandoned). Ryan stated the show's cancellation came about because it kept changing direction, and stated it led to her being less ambitious about her career. "I'm more go-with-the-flow now," she said.[2]
On Red Nose Day 2007, Ryan appeared in a brand new Mr. Bean sketch written and recorded for Comic Relief.

In May 2007, Ryan revealed she had auditioned the previous year for the role of Vesper Lynd in Casino Royale, eventually given to Eva Green. In late 2007 she appeared in Flick, a Welsh independent film co-starring Faye Dunaway and Leslie Phillips.

Prior to Bionic Woman, she appeared in Jekyll for the BBC, a modern day version of Strange Case of Dr Jekyll and Mr Hyde starring James Nesbitt. It began its six-episode run on 16 June 2007 and was released on DVD in the United States on 18 September 2007, one week prior to her debut in Bionic Woman.
She has also appeared as the sorceress Nimueh in the BBC drama series Merlin, playing the role in several episodes of the show's first season.

Ryan is signed to Independent Models in London, and is also a patron of children's cancer charity CLIC Sargent.

Michelle Ryan also filmed an ITV romantic drama, Mister Eleven in 2008. It also stars Sean Maguire, Adam Garcia, Lynda Bellingham, Olivia Coleman and Denis Lawson.