By Jennifer Armstrong
Updated March 09, 2009 at 05:00 PM EDT

Mad Men star Elisabeth Moss will costar alongside Sarah Jessica Parker and Hugh Grant in the romantic comedy Did You Hear About the Morgans?, written and directed by Marc Lawrence (Music and Lyrics), according to The Hollywood Reporter. Parker and Grant are playing a high-powered Manhattan couple who witness a murder and are placed in witness protection in a small Wyoming town; Moss will play Parker’s uptight assistant in Morgans, her first movie role since breaking out in the critically acclaimed AMC drama. Production begins in May in New York.