Sarah Michelle Gellar is returning to television with a half-hour HBO project, The Wonderful Maladys, from screenwriter Charles Randolph.

According to Variety, the Gotham-set ensemble series revolves around the dysfunctional lives of three adult siblings who lost their parents at a young age.

Randolph described Gellar's character as having "a kind of zealous immaturity -- like a drug addict with a to-do list."

Randolph wrote the script on spec last year with Gellar and HBO in mind. HBO recently bought the script and is aiming to shoot the single-camera pilot early next year. Gellar and Randolph will serve as exec producers should the project go forward, along with Brillstein Entertainment Partners.