The third season of ABC Family‘s hugely popular teen drama mystery thriller television series “Pretty Little Liars” is now underway. The show’s casting directors are auditioning actors for guest starring and day player roles, as well as hiring extras and stand-ins. The network has ordered 24 episodes that will shoot through October, 2012. The story is set in the fictitious town of Rosewood, Pennsylvania but shoots in Los Angeles. “Pretty Little Liars” premiered on June 8, 2010 becoming ABC Family’s highest-rated series debut on record.