Elisabeth Moss (Mad Men has joined Sarah Jessica Parker and Hugh Grant in Did You Hear About the Morgans?, Marc Lawrence's romantic comedy for Columbia Pictures.
According to The Hollywood Reporter, Parker and Grant are starring as an estranged high-powered New York couple who witness a murder and are placed in a witness-protection program in a small Wyoming town.
Moss will play Parker's executive assistant with a controlling and almost obsessive-compulsive personality.
Lawrence will be directing from his own script, which previously was untitled, with Liz Glotzer and Martin Shafer producing.
Production is set to begin in May in New York.