Freeform will premiere the spinoff to its successful thriller series Pretty Little Liars on March 20, the network said during its Television Critics Association winter tour session on Tuesday.

Pretty Little Liars: The Perfectionists -- based on the novel The Perfectionists with characters from the Sara Shepard novel Pretty Little Liars -- follows the overachieving residents of a small town where the high-stakes environment eventually causes the murder of one of its residents, according to the network. Pretty Little Liars stars Janel Parrish and Sasha Pieterse (pictured above) reprise their roles from the new series. 

Pretty Little Liars: The Perfectionists is produced by Alloy Entertainment and Long Lake Media in association with Warner Horizon Scripted Television. I. Marlene King (Pretty Little Liars, Famous in Love) serves as executive producer with Charlie Craig (Pretty Little Liars, The 100), Leslie Morgenstein (Pretty Little Liars, The Vampire Diaries), Gina Girolamo (The 100, The Originals) and Joseph Dougherty (Pretty Little Liars). 

Freeform has ordered a pilot spinoff of its popular Pretty Little Liars series starring two characters from the original show, the network said Monday.

 The series, Pretty Little Liars: The Perfectionists, will star Sasha Pieterse and Janel Parrish reprising their roles as Alison DiLaurentis and Mona Vanderwaal respectively and is based on the popular book series The Perfectionists, written by Sara Shepard, who also penned the bestselling book series Pretty Little Liars.

According to Freeform, the series revolves around characters in the town of Beacon Heights where everything seems to be perfect until the stress of needing to be perfect leads to the town’s first murder.

“Pretty Little Liars was a cultural phenomenon so it's no wonder fans wanted more." said Karey Burke, executive vice president, programming and development, Freeform in a statement. "We can't wait to continue Marlene King's rich and revolutionary storytelling with a new crop of leading ladies from Beacon Heights who will hold just as many secrets and lies as Rosewood did."