OMG: Anna Faris Leaves 'Mom' In Crisis After Shock Exit

Actress Anna Faris made a shock announcement to the production team of Mom last week, saying that she will be leaving the show in which she has starred for the last seven years.

Studio bosses are now desperately trying to figure out what to do next. "It was sudden and unwelcome, and it left the entire network scrambling. This is not a good thing at all," an on-set source confirmed.

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The exact reason for her departure has left producers scratching their heads, as Faris never complained about conditions or dissatisfaction about pay.

In contrast, Faris issued a statement saying that her time on the shows was "fulfilling and rewarding," adding: "I'm so thankful to Chuck, the writers, and my amazing castmates for creating a truly wonderful work experience. While my journey as Christy has come to an end, allowing me to pursue new opportunities, I'll be watching next season and rooting for my TV family."Read her statement here.

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Making matters worse, filming of the new season was due to start this week.

"Mom has been one of CBS' more profitable scripted shows, in a very challenging economic time. And now one of the leads is gone. It's actually a nightmare. No one wanted this," a source said.

With showrunners scrambling, it is still unclear as to how Faris' character will be written out of the plot.