Michelle Flaherty is a fictional character from the popular film series American Pie. She is portrayed by actress Alyson Hannigan and is known for her quirky personality and memorable one-liners. Michelle is a band geek who becomes a significant character in the story, particularly in her relationship with Jim Levenstein, played by Jason Biggs. In the films, Michelle is characterized by her unique sense of humor and her unexpected confidence. She famously declares, "This one time, at band camp..." which has become an iconic catchphrase associated with her character. Her role adds a comedic element to the series, contributing to its overall appeal.