Pretty Little Liars: The Perfectionists is an American drama mystery thriller television series created by I. Marlene King. The series is a sequel to Pretty Little Liars and based on the novel The Perfectionists by Sara Shepard. Freeform ordered the pilot on September 25, 2017, as the second spin-off series of Pretty Little Liars, which would include some of the main characters from that series. It is the third series in the Pretty Little Liars franchise. Freeform picked up the series for a 10-episode season on May 14, 2018, which premiered on March 20, 2019.