Pretty Little Liars is an American teen drama television series created by I. Marlene King for Freeform. It is based on Sara Shepard's novel series of the same name. Some of the characters appeared in the spin-off shows Ravenswood, Pretty Little Liars: The Perfectionists and Pretty Little Liars: Original Sin. Below is a list consisting of the many characters who have appeared throughout the original series' seven-season run.