Part 2 of The Chilling Adventues Of Sabrina hasn't even aired yet and the show is already being given 16 more episodes. The news came via the show's official Twitter account, where Salem the cat tells us that not only will Part 2 premiere on April 5th of 2019, but parts three and four are on the way. The show was originally ordered for 20 episodes: 10 in part one and 10 in part two.
In a statement to Variety, showrunner Roberto Aguirre-Sacasa said “Praise Satan! I’m so grateful to my partners at Warner Brothers, Netflix, Berlanti Television, and Archie Productions for supporting this darker vision of the world’s most famous teen witch,” said Aguirre-Sacasa. “And I’m thrilled to be continuing to tell Sabrina’s chilling adventures with our incredible cast and crew, led by the unstoppable Kiernan Shipka.”
The new episodes will begin production in 2019. Don't worry though, if you're a fan of the show you won't have to wait too long for some new content. The series released a holiday special called "A Midwinter’s Tale,” last Friday which is sure to tide you over for now.