Credit: Jason Merritt/Getty Images; Splash News Online

Jennifer Lawrence's Hunger Games reinvention is complete!

The stunning blonde Oscar nominee, 20, already unveiled her new brunette do and posed in character as Katniss Everdene on a recent Entertainment Weekly magazine cover -- but she looked utterly unrecognizable in first pics from the Hildebran, North Carolina set of the film, based on the popular young adult book trilogy by author Suzanne Collins.

Lawrence looked almost dowdy -- her curves covered up -- in a simple blue dress and sneakers and seemingly little makeup.

She knew what she was getting into, though, taking on the role from the blockbuster series. "I knew that as soon as I said yes, my life would change," she told Entertainment Weekly.

"And I walked around an entire day thinking 'It's not too late, I could still go back and do indies, I haven't said yes yet, it's not too late.'"