British actress joins 'Caprica' cast

Polly Walker has joined the cast of upcoming Battlestar Galactica prequel Caprica.

The British actress, best known for her lead roles in Rome and State Of Play, will play Sister Clarice in the two-hour pilot for the Sci Fi Channel.

The Hollywood Reporter describes Clarice as a "gracious, eloquent and duplicitous high priestess and headmistress of the Athena Academy, a private religious school".

Walker joins Eric Stoltz, Esai Morales and Paula Malcomson in the cast of Caprica, which is due to begin filming in the summer.

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