CBS' Mom has lost one of its leading ladies after Anna Faris announced that she's exiting the show ahead of its eighth season. According to sources close to the matter, Faris is looking to pursue other opportunities and feels as though she's had a great seven-year run as a part of the cast. Her character, Christy, will not be recast, and writers plan to address her exit as a part of the show. While Faris' decision might feel a tad abrupt, production on the upcoming season doesn't start until September 14.