The battle of the sexes is on. Katherine Heigl, and Gerard Butler leads; co-starring Eric Winter, John Michael Higgins, Nick Stacy, with Kevin Connolly, and Cheryl Hines. Robert Luketic directs from the screenplay by Karen McCullah Lutz & Kristen Smith; Co-Screenplay/Story by Nicole Eastman. Produced by Tom Rosenberg and Gary Lucchesi • Producers: Steven Reuther, Kimberly di Bonaventura and Deborah Jelin Newmyer • Executive Producers: Andre Lamal, Eric Reid, Katherine & Nancy Heigl, McCullah Lutz & Smith and Ryan Kavanaugh. Music by Aaron Zigman. a Lakeshore Entertainment/Steven Reuther production for Columbia Pictures, with Relativity Media. Filmed around Los Angeles, CA from April 16 - July 12, 2008. Approved [No. 44576]/rated R for sexual content; and for language.