It should not be confused with the first book in the series , also called Diary of a Wimpy Kid . There is the second film in the `` Diary of a Wimpy Kid '' film series that was released on March 25th , 2011 , which was based on the second Diary of a Wimpy Kid book , `` Diary of a Wimpy Kid : Rodrick Rules '' , with Zachary Gordon returning as Greg Heffley .