The Hunger Games Character Guide - Rotten Tomatoes
Primrose Everdeen (Willow Shields)

Prim is Katniss' younger sister and a budding healer. She was the catalyst for the revolution when Katniss volunteered as tribute in her place during the reaping for the Hunger Games. Though Katniss has always protected her "Little Duck," it's Prim who is holding it together for her big sister now. Prim is currently training as a doctor in District 13. She adores her cat Buttercup, even going as far as almost not making it back inside during an attack because she has to find him. Katniss is not Buttercup's biggest fan and that's pretty mutual.