Michelle Ryan

Michelle Ryan (born 22nd April 1984), a London-born actress, has been cast in the role of Lady Christina de Souza in the upcoming Doctor Who special, Planet of the Dead, which is scheduled to air at Easter 2009.

Merlin
Michelle is well known for starring in BBC One's fantasy drama, Merlin, as Nimueh.

Other information
Born only a few weeks after Colin Baker's debut as the Doctor, Ryan is best known in the UK for her work on the soap opera EastEnders, and for co-starring in Steven Moffat's miniseries, Jekyll. In North America she is best known for her work on the short-lived NBC series Bionic Woman in 2007.

Reportedly Ryan was considered a candidate for companion after Billie Piper (who she subsequently co-starred with in a TV production of Mansfield Park) left the series, and in January 2009, before it was announced that she had been cast in the special, there was considerable media speculation suggesting that she had been, or will be cast as the companion to the upcoming Eleventh Doctor (a fact that, as of January 2009, has yet to be confirmed either way).