ABC Family rolled out plans for a spinoff series to “Pretty Little Liars.” The Hollywood Reporter’s Live Feed reports that the cable channel is moving ahead with plans for “Ravenswood,” from “Liars” exec producer Marlene King, set for an October premiere.

ABC Family also ordered season five of “Pretty Little Liars,” with production on season four just under way.

“’Ravenswood’ centers on a town not far from Rosewood, Penn., which has suffered under a deadly curse for generations,” THR reports. “Five strangers find themselves connected by this fatal curse and need to dig into the town’s mysterious and terrible history before it’s too late for each of them. The series will follow this year’s ‘Pretty Little Liars’ Halloween episode.”

Executive producers on “Ravenswood” are King, Oliver Goldstick, Joseph Dougherty and Leslie Morgenstein, the report notes.

THR adds: “The news comes after the ‘Pretty Little Liars’ season three finale on March 19 dominated social media, and averaged just under 3 million viewers to the premiere telecast. The season closer was the first time a TV series amassed more than 1 million tweets during the broadcast, accounting for one-third of Twitter activity.”

Said ABC Family President Michael Riley: “’Pretty Little Liars’ is brand-defining and demo-defining for ABC Family. We are proud to be able to grow the ‘PLL’ franchise in two ways — both by adding additional seasons of the original and by extending the storytelling into a spinoff. ‘Ravenswood’ will become another ‘must-tweet-TV’ series for us.”