Pop Culture on Instagram: "Rachel McAdams played Regina George in Mean Girls (2004), the manipulative and glamorous leader of The Plastics at North Shore High. Though she was 25 at the time, she convincingly portrayed a 16–17-year-old high school queen bee. McAdams originally auditioned for the role of Cady Heron, but the director felt her mature presence fit Regina better. Her performance made Regina George an iconic character, known for scenes like “Get in, loser, we’re going shopping,” the Bu