Fred Wolf Director Anna Faris Shelley Darlington Actor, Executive Producer Colin Hanks Oliver Actor Emma Stone Natalie Actor Kat Dennings Mona Actor Katharine McPhee Harmony Actor Rumer Willis Joanne Actor Christopher McDonald Dean Simmons Actor Beverly D'Angelo Mrs. Hagstrom Actor Tyson Ritter Colby Actor Kimberly Makkouk Tonya Actor Kiely Williams Lily Actor Dana Goodman Carrie Mae Actor Richard Blake Volcano Jock Actor Karen McCullah Screenwriter, Executive Producer Kirsten Smith Screenwriter, Executive Producer Adam Sandler Producer Jack Giarraputo Producer Allen Covert Producer Heather Parry Producer Shelly Johnson Cinematographer Debra Chiate Film Editing Missy Stewart Production Design Mona May Costume Design Waddy Wachtel Original Music John Chichester Art Director Tracey Doyle Set Decoration Lisa London Casting Catherine Stroud Casting