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Tina Fey

Years on the show: 2000-06 (started as a writer in 1997) Memorable roles: Weekend Update anchor; Sarah Palin Away from "SNL": Tina Fey made her film debut as a writer and co-star in "Mean Girls" in 2004, then co-starred with "SNL" alumna Amy Poehler in "Baby Mama" in 2008. She created the... NBC / NBC via Getty Images