Polly Walker is no stranger to period dramas, appearing as Irish governess Mary in Talk of Angels, as well as other notable movies such as the Gwyneth Paltrow adaptation of Emma and Enchanted April. Her TV résumé is even more impressive, even without the role of Portia Featherington; there, she's probably best known as Rome's Atia of the Julii, a role that earned her a Golden Globe nomination.