Mostly Ghostly is a 2008 horror comedy fantasy film that is based on the book series created by R.L. Stine of Goosebumps fame. A sequel, Mostly Ghostly: Have You Met My Ghoulfriend?, was released in September 2014.
Based on the successful book series by R.L. Stine, this spooky tale finds 11-year-old Max making a deal with the ghosts who haunt his home. If Max helps them find what was responsible for their parents' disappearance, they'll help him transform from a social nobody to the most popular kid in school.
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US data via JustWatch
