Simplify the following text for a Grade 6 native English-speaking person.
Original: 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 .
Simplified: It should not be confused with the first book in the series , also called Diary of a Wimpy Kid .