Fionna and Cake, the genderbent versions of Finn and Jake, first appeared in a 2011 episode of Adventure Time.

Fionna the Human and Cake the Cat — the genderbent Adventure Time characters — have a new Max series. Check out the first trailer, which premiered at SDCC.

Cartoon Network Studios has greenlit a new 'Adventure Time' prequel series and is developing a film and preschool show set in the Land of Ooo.