The seven-season I. Marlene King teen mystery thriller series, based on Sara Shepard's book series, premiered on ABC Family on June 8, 2010. "HAPPY 10 YEARS OF PLL! This show changed my life," Lucy Hale wrote on Instagram. "Eternally grateful and always proud of what we accomplished."
TOPICS: Pretty Little Liars, ABC Family, Freeform, Lucy Hale, Retro TV