Aniston is also serving as an executive producer on the movie, being directed by Daniel Barnz with a script from Patrick Tobin.
Chris Messina plays Claire's ex-husband and Felicity Huffman is the leader of the support group. William H. Macy, Marianne Jean-Baptiste, Britt Robertson and Lucy Walters also star.
"Of the zillions of Jennifer Aniston fans, I might be the biggest one of all," Barnz said in a statement released in February when Cake was announced as part of a five-picture deal under the new production shingle Cinelou Films. "I've especially loved her more dramatic performances, and I can't wait to watch her tackle a role that has such a brilliantly funny voice and so much raw pain."
The film was shooting on location in a Los Angeles cemetery last week.
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