Director: Raja Gosnell Starring: Hank Azaira, Neil Patrick Harris, Brandon Gleeson, Jayma Mays, Katy Perry, Alan Cummings, Jonathan Winters Written by: J. David Stern, David N. Weiss, Jay Scherick, David Ronn and Karey Kirkpatrick Running Time: 105 mins Cert: U Release date: 31st July 2013 La. La. La la la la. Its a happy smurf-day…