"There is another big milestone left in Belly's journey, and I thought only a movie could give it its proper due," Han said in the press release, referring to "The Summer I Turned Pretty" protagonist...

The Summer I Turned Pretty 's showrunner and author Jenny Han revealed the efforts made to ensure the show's final episodes remained a surprise for fans.

“There is another big milestone for Belly,” Jenny teased during an appearance alongside the show’s stars on Today Sept. 18.