The Disney Channel has announced e new upcoming short-form special “Under The Sea: A Descendants Story,” which is scheduled to hit the network in September. “Descendants” arch-nemeses Mal and Uma will face-off in an underwater showdown and it’s launching on the Disney Channel on September 28th.

Dove Cameron and China Anne McClain will reprise their roles as Mal and Uma for the new special, which will air just in time for the back-to-school crowd. The series will be a live-action short-form special filled with more Disney music and dance and there’s sure to be a ton of promotional videos and teasers over the next few weeks. Immediately following the Disney Channel premiere, “Under the Sea: A Descendants Story” will be available on the DisneyNOW app and Disney Channel VOD.

In the story, Mal emerges from the shadows of a mystical forest onto a dark coastline where she crosses paths with Dizzy, played by Anna Cathcart. “Descendants 2” stars Thomas Doherty and Dylan Playfair will appear in their roles of Harry and Gil, respectively, as part of Uma’s wicked pirate gang.

Disney’s “Descendants” franchise has been a runaway hit for the network and continues to branch out into new stories. “Descendants” and “Descendants 2” music videos have garnered over two billion global views and both movie soundtracks are certified gold and hit #1 on iTunes and Billboard charts. In the U.S., “Descendants” and “Descendants 2” costumes were the top-selling Halloween costumes at Disney Stores and Party City.

Not only that, more than three million “Descendants” and “Descendants 2” dolls and over five million “Descendants”-related books in print, including three popular young adult novels that were featured on the New York Times Best Sellers List, have been sold since the franchise launched. Disney has a cerified hit franchise on their hand and the network is giving the people what they want. “Descendants” and “Descendants 2” were #1 Cable Movies in 2015 and 2017, respectively. Of course there’s more “Descendants” on the way, the highly-anticipated trequel “Descendants 3” will premiere in Summer 2019 on Disney Channel.