- HD 1080
- Runtime: 90m.
- Status: Released
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- Languages: en
- Country: Canada, United States of America
- Director: Ron Oliver
- Stars: Jennifer Stone, Vanessa Morgan, Wesley Morgan, Kiana Madeira, Kristin Booth
- keywords: high school, teen movie, based on children's book, blogger, movie star
- Production_studio: 9 Story Media Group
- Slogan: Fame is Fleeting. The Internet is Forever...
- providers: Amazon Prime Video, Peacock Premium, Amazon Prime Video with Ads, Peacock Premium Plus
- The Harriet the Spy: Blog Wars is featured in the top rankings of 2010
- #53 in Top Family Movies of 2010
Young spy Harriet Welsch crosses paths with popular student Marion Hawthorne as the two girls vie to become the official blogger of their high school class.
