Ben Kingsley, Josh Peck, Famke Janssen, Mary-Kate Olsen, Olivia Thirlby and Method Man have been cast in Occupant Films comedy “The Wackness.”Occupant partners Keith Calder, Felipe Marino and Joe Neurauter are producing. Jonathan Levine directs from his own script; lensing recently started in New York. Story, set in 1994, centers on a troubled teenage drug dealer and a drug-addled psychiatrist — after the former trades pot for therapy sessions, then falls for the doctor’s daughter. Levine made his directorial debut on Occupant horror film “All the Boys Love Mandy Lane,” set for release next year via Senator. Occupant is in post-production on Peter Himmelstein’s “The Key Man,” starring Jack Davenport, Hugo Weaving, Brian Cox and Judy Greer.