Sarah Silverman is in negotiations to join the high-wattage cast of Seth MacFarlane’s Western comedy A Million Ways to Die in the West , The Hollywood Reporter has learned. MRC is behind the movie, which boasts a cast that so far includes Charlize Theron, Liam Neeson, Amanda Seyfried , and Giovanni Ribisi . MacFarlane, whose Ted grossed $545.8 million worldwide, co-wrote the script and is directing and starring. A Million Ways to Die follows a cowardly sheep farmer ( MacFarlane ) who chickens out of a gunfight and sees his girlfriend ( Seyfried ) leave him for another man. When a mysterious woman ( Theron ) rides into town, she helps him find his courage. But when her outlaw husband ( Neeson ) arrives seeking revenge, the farmer must put his newfound courage to the test. Sources say Silverman would play the town’s well-worn prostitute, who engages in all sorts of lewd activities but refuses to have sex with her fiancé ( Ribisi ), believing that as Christians the couple shou