The film stars Alexa Vega and Mika Boorem with supporting roles from Jane Lynch, Sara Paxton, Brie Larson, Steve Carell and Jeff Garlin.

[3][4] On the last day of 8th grade before their freshman year in high school, Julie Corky has a slumber party with three friends, Hannah Carlson, Farrah James, and Yancy Williams.

The list includes things like a picture of the girls with a date inside a nightclub, the insignia from a local private security company, a pair of boxers from Steve Phillips (a boy that Julie has a crush on) and to dress an Old Navy mannequin with their own clothing.

After paying her older brother Ren to keep her parents believing that they are still home, the girls sneak out of Julie's house, using Yancy's father's Hypermini to travel to different locations and get the required objects.

The other girls meanwhile try to find a way to charge their car, and Staci and her team alert Patroltec about a suspicious person at Steve's house.

The next morning at breakfast, Gabby confronts her asking "exactly" what they did last night, showing Julie the scarf she had dropped in the Cosmo club.

After she says goodbye to her friends, Julie finds Steve waiting inside her tree fort with her lost crown, where the two finally share a kiss.

The site's critics' consensus reads, "Tween girls will enjoy this sugar coated fluff, but others will find Sleepover a snooze.