Rather than use the conventional ski mask, McCarthy wears a paper bag over her head to commit the crime.
"Tammy," which also stars Allison Janney, Susan Sarandon and Mark Duplass, began shooting last spring with McCarthy starring and co-directing with spouse Ben Falcone. McCarthy and Falcone are also producing along with Will Ferrell and Adam McKay through their Gary Sanchez banmer.
"Tammy" follows a women who, after losing her job and learning that her husband has been unfaithful, hits the road with her profane, hard-drinking grandmother (played by Sarandon). McCarthy and Falcone co-wrote the script.
The film opens July 2.
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