It was announced that Lionsgate and director Gary Ross cast Rambin in her first major studio film, in the role of Glimmer, the cut-throat District 1 Tribute in the first film adaption (2012) of the popular book series called "The Hunger Games" by Suzanne Collins. In an interview with "Seventeen", Rambin explained how she trained for the role, "I did a lot of sword training, which was really challenging. I also did a lot of boxing training and hand-to-hand combat. I just had to get in the mindset of someone who would want to do that every day! It was cool because I pushed myself physically and mentally. I couldn’t be vain about being sweating and smelling gross or worry about taking a hit or two.". After the film's success, Rambin and the cast of "The Hunger Games" went on a "The Hunger Games Convention Tour" and also appeared in "The World Is Watching: Making the Hunger Games".