Spencer Jill Hastings is a fictional character, one of the five main characters who appear in the Pretty Little Liars novel series and its Freeform television adaptation. Created by American author Sara Shepard, she is a member of the group known as the Liars, and is best friend to the four other members, who are protagonists of the story. Portrayed by Troian Bellisario, the character was developed for television by the series' showrunner I. Marlene King and appeared in each of the show's 160 episodes during its seven-years-long run, from its premiere on June 8, 2010, to its finale on June 27, 2017.