Karen Smith is a fictional character from the movie Mean Girls, which was released in 2004. She is portrayed by actress Amanda Seyfried and is known for her bubbly personality and somewhat naive demeanor. Karen is a member of the popular group known as the Plastics, alongside her friends Regina George and Gretchen Wieners. In the film, Karen often provides comic relief with her innocent misunderstandings and humorous remarks. Despite her lack of intelligence, she is loyal to her friends and plays a significant role in the dynamics of high school social life depicted in the movie.