The series, titled Unsupervised, centers on two best friends trying to survive their teenage years and do the right thing without any parental supervision. The series will premiere in January and be paired with FX's other animated comedy, Archer.
"Having worked with David, Rob and Scott for many years on Sunny, it gives us great pleasure to see them make their own stamp on FX," FX's Executive Vice President of Original Series Nick Grad said. "Unsupervised is a great addition to our comedy roster and, like all of our comedies, it's smart and really funny."
The news comes on the day of It's Always Sunny's Season 7 premiere and less than two months after FX signed a development deal with the comedy's three stars and executive producers, Rob McElhenney, Glenn Howerton and Charlie Day. The deal keeps the show on the air for at least two more seasons, with an option for more.
After making a name for itself with drama series like The Shield, FX has been more aggressive about its comedy development in recent years.
Hornsby is also the creator and executive producer of the upcoming CBS comedy, How to Be a Gentleman.
Will you watch Unsupervised?