Pretty Little Liars is a mystery drama TV series created in 2010 by I. Marlene King (one the writer of If These Walls Could Talk), based on Sara Shepard‘s novels. Pretty Little Liars revolves around the lives of four girls, whose clique falls apart after the disappearance of their leader, Alison DiLaurentis. After her funeral, they begin to receive text messages from a mysterious source called A, who threatens to expose their long-hidden teen secrets…

Some of the cast of Pretty Little Liars :

• Troian Bellisario (her father Donald P. Bellisario is the creator of NCIS, JAG, Quantum Leap, Magnum PI etc. She is the stepsister of NCIS actor Sean Murray) as Spencer Hastings
• Ashley Benson (Eastwick, Days of Our Lives) as Hanna Marin
• Holly Marie Combs (Piper Halliwell in Charmed) as Ella Montgomery
• Lucy Hale (Becca Sommers in Bionic Woman 2007) as Aria Montgomery
• Laura Leighton (Melrose Place, Beverly Hills 90210) as Ashley Marin
• Chad Lowe as Byron Montgomery
• Shay Mitchell as Emily Fields
• Sasha Pieterse as Alison DiLaurentis
• Ian Harding as Ezra Fitz
• Tammin Sursok as Jenna Marshall
• Janel Parrish as Mona Vanderwall
• Torrey DeVitto as Melissa Hastings

Here are the promo pictures of the 1st season of Pretty Little Liars (70 hi-res photos) :