In April, AMC announced the Walking Dead franchise was expanding to include a third series. According to the network, the series "will feature two young female protagonists and focus on the first generation to come- of-age in the apocalypse as we know it. Some will become heroes. Some will become villains. In the end, all of them will be changed forever. Grown-up and cemented in their identities, both good and bad."

Here's what we know so far about the as-yet-untitled third Walking Dead series (after The Walking Dead and Fear the Walking Dead).

It's coming in spring 2020. The cast gathered for a teaser that previewed that the show will be about growing up in the zombie apocalypse, showed off some concept art for the show, and confirmed that the show is less than a year away. The first movie of the Rick Grimes movie trilogy is also expected next year.

It has some familiar producers. The series is co-created by Scott M. Gimple, chief content officer of the Walking Dead universe and former Walking Dead showrunner, and Matt Negrete, who has been a writer and producer on The Walking Dead for the past five seasons and whose credits include Andrew Lincoln's final episode and the Negan-introducing Season 6 finale. Negrete will be showrunner of the new series. Kong: Skull Island director Jordan Vogt-Roberts will direct.

Discover your new favorite show: Watch This Now!

It will have some significant differences from the other shows. Unlike the other two series, which do 16-episode seasons, Season 1 of the new series will be 10 episodes. It will shoot in Virginia, which is not a place the other two have filmed. The Walking Dead is set in Virginia as of Season 10 but films in Georgia, while Fear the Walking Dead has filmed in numerous locations and is currently set and filmed in Texas.

<em>The Walking Dead</em>The Walking Dead

A bunch of young people have joined the cast. According to Variety, Alexa Mansour, Nicolas Cantu, and Hal Cumpston have been cast in major roles. Mansour, who has appeared on Madam Secretary, SEAL Team, and The Resident, will play what sounds like one of the two protagonists, who Variety sources describe as "a good-natured rule breaker who lives for today. She is likable and funny on the outside but sad on the inside." She confirmed the casting on social media. Cantu and Cumpston will play boys who are small for his age and big for his age, respectively.

At San Diego Comic-Con, Gimple announced some other cast members. The Americans' Annet Mahendru will play a character named Huck, and The Red Line's Aliyah Royale will play Iris.

And Younger star Nico Tortorella will play Felix, "an honorable man of his word who isn't afraid to fight for others' safety and acceptance."

Scott Gimple teased some details at Comic-Con. Gimple said the show will be about kids who came of age relatively sheltered from the zombie apocalypse, in what he a called a "first world situation" compared to the mud and blood we've seen so far.

"There's a big secret about the Walking Dead universe," he said, speaking about the spin-off publicly for the first time. "All these years we've just seen a tiny sliver of the Walking Dead world. There's a whole lot of world out there. The big secret is that all along, there have been other civilizations that survived the apocalypse. We saw hints of that in Season 7 of The Walking Dead and again in 'The End of Everything,' and now we're about to show a lot more of the world in a bunch of different projects," he said. "These kids could stay where they grew up, in this place of comfort and security, but they leave their home to risk everything for a quest while they are pursued by adult friends on a quest of their own. We will see some of these kids become heroes and others become villains."

It's coming to New York Comic Con. The series will get a formal unveiling at NYCC on Saturday, Oct. 5, as cast and crew will gather for a Walking Dead universe panel. We'll probably find out the official title (the working title is Monument) and maybe even see some footage.

It's coming in 2020. Production in Virginia is underway. The first movie of the Rick Grimes movie trilogy is also expected next year.

The Walking Dead spin-off is coming to AMC next year. The Walking Dead is available to stream on Netflix, while Fear the Walking Dead is available on Hulu.