Gotham is giving one of its emerging villains an extreme makeover and a promotion.

TVLine has learned exclusively that when the Fox drama returns this fall with Season 3, little Ivy Pepper will have transformed into big, bad Poison Ivy. As a result, Clare Foley — who has intermittently appeared as the plant-obsessed orphan during the series’ first two seasons — will not be returning.

Casting is underway for an actress in her late teens to assume the now-series regular role of the would-be eco-terrorist.

As TVLine previously reported, Gotham‘s upcoming third season will also mark the arrival of DC Comics staples Vicki Vale and the Mad Hatter. The Season 2 finale also teased the entrance of Bruce Wayne’s long-haired doppelgänger, a development exec producer John Stephens told TVLine is “in line with all the other story we’ve been telling [in Season 2], but one piece that we’ve kept hidden,” adding that with the release of Strange’s bus full of monsters, “the nature of the city of Gotham will change.”

What do you think of Ivy’s metamorphosis into full-blown bad girl? Thoughts on which Hollywood ingenue could do the plum part justice? And will you miss Foley? These are the questions. Deposit your answers in the comments.