Parents of 8 year-old boys, you’ve been warned – the popular book series “Diary of a Wimpy Kid” is coming to the big screen. “Diary of a Wimpy Kid,” expected to hit movie theaters in April 2010, will star Steve Zahn and Rachael Harris as parents to Zachary Gordon’s wimpy kid character.

The “Diary of a Wimpy Kid” series, by Jeff Kinney, has sold more than 20 million copies.