FUN SIZE is a funny and outrageous family ensemble comedy that all takes place on one Halloween night. A young girl's popularity is in jeopardy when she is forced to track down her kid brother instead of going to THE party of the year. Yet her kid brother shows her what popularity is all about, and her rush to find her brother with her nerd neighbor shows her that popularity might not be exactly what she really wants. Teen sensation Victoria Justice (Nickelodeon's Victorious) stars as Wren, a whip-smart high school senior stuck babysitting her annoying little brother, but that all changes when he somehow manages to get loose. Now Wren and her three friends need to find him as they set off on the most unexpected and unforgettable adventure of their lives... as long as mom doesn't find out!