The pic will mark Schwartz’s feature film directing debut after working often in TV.
He will also produce along with Stephanie Savage through their Fake Empire shingle along with Anonymous Content.
Max Werner penned the script, which revolves around a teen who is forced to take her brother out trick-or-treating, loses him way, and must find him before their mother finds out.
Bard Dorros, David Kanter and Michael Beugg will join Schwartz and Savage as producers.
Project has gained momentum in recent months. Werner’s script was among those on the 2010 Black List, made up of the hottest specs on the market.
While many in the industry were focused on Katniss in “Hunger Games” as the hot role for young talent, the “Fun Size” role had also been gaining cachet for young female stars.
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Other names showing interest in the role included Zoe Kravitz and Emma Roberts.
The casting makes sense for the studio — Paramount now has a thesp attached who already has a strong fanbase from “Victorious,” one of Nickelodeon’s more popular shows.
Since the studio is aiming for a PG-13 rating, younger auds may be attracted to the pic through Justice’s family-friendly image.
For Justice, the job allows her to make the leap from kidfare to a more mature role.
With Justice set and production scheduled for summer, the remaining cast should come together quickly. No release date has been set.
Justice is repped by UTA.