Leslye Headland Director, Screenwriter Kirsten Dunst Regan Actor Isla Fisher Katie Actor Lizzy Caplan Gena Actor James Marsden Trevor Actor Kyle Bornheimer Joe Actor Rebel Wilson Becky Actor Adam Scott Clyde Actor Hayes MacArthur Dale Actor Arden Myrin Melissa Actor Ella Rae Peck Stefanie Actor Will Ferrell Producer Adam McKay Producer Jessica Elbaum Producer Brice Dal Farra Producer Lauren Munsch Producer Claude Dal Farra Producer Tom Quinn Executive Producer Chris Henchy Executive Producer Paul Prokop Executive Producer Doug Emmett Cinematographer Nicholas J. Don Vito Film Editing Jeffrey Wolf Film Editing Andrew Feltenstein Original Music Michael Wandmacher Original Music John Nau Original Music Richard Hoover Production Design Casey Smith Art Director Mary Prlain Set Decoration Anna Bingemann Costume Design Jennifer Euston Casting