Based on a book, Pretty Little Liars follows four best friends (Spencer, Hanna, Aria & Emily) whose clique falls apart after the disappearance of their queen bee, Alison. Three years later, estranged friends reunite when they begin receiving messages from someone using the name "A" who threatens to expose their secrets - including long-hidden ones they thought only Alison knew.
Series Fun Facts
- Jean Louisa Kelly was originally cast as Ella, but before the pilot was replaced by Holly Marie Combs.
- Mona's surname was going to be spelled Vanderwall for the show but was changed back to Vanderwaal.
- Many of the scenes were filmed on the same lot(s) used as the town of Stars Hollow from Gilmore Girls.