Gino Nichele Director Swinton O. Scott III Director Brady Noon Greg Voice Ethan William Childress Rowley Voice Christian Convery Fregley Voice Hunter Dillon Rodrick Voice Chris Diamantopoulos Frank Voice Erica Cerra Susan Heffley Voice Billy Lopez Mr. Underwood Voice Robert Moloney Joshie Voice Jeff Kinney Screenwriter, Producer Nina Jacobson Producer Brad Simpson Producer Rick Mischel Executive Producer Giuseppe Improta Cinematographer Sylvain Blais Film Editing John Paesano Original Music Micah Dahlberg Casting Christian Kaplan Casting Chad Weatherford Art Director Edison Yan Art Director