Cynthia Nixon has joined the cast of 'The Big C,' starring Laura Linney as a wife/mother/teacher who gets diagnosed with terminal cancer. The Emmy-winning 'Sex and the City' alum will appear in four episodes of the series, which officially debuts on Aug. 16. Gabourey Sidibe ('Precious') and Idris Elba ('The Wire') are also slated for recurring roles [Deadline Hollywood]

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