Pretty Little Liars Debuts to Huge Ratings, Welcomes Special Guest Star

Following this week's pilot episode of Pretty Little Liars, we have one thing to say to The CW executive that passed on this show: Sucks to be you!

The drama premiered to 2.5 million viewers, making it the most-watched debut in ABC Family history, and earning a higher rating that average episodes of 90210 and Gossip Girl.

The series will move forward with an episode on June 15 titled "The Jenna Thing" (watch a preview for it NOW), along with a special guest-starring appearance.

Sara Shepard, the author who penned the books on which Pretty Little Liars is based, will make a cameo later this summer as substitute teacher at Rosewood High School. She'll appear in episode seven.

Says star Lucy Hale of Shepard and her novels: "When I got involved in the show, I went and bought all of [the books]. I'm now on the seventh one... I can't stop reading them. They're addictive."

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.