So long, innocent Emma: Jayma Mays is on her way to FX!
In other casting news...
Leland Orser and Patrick St. Esprit are headed to "Revolution." "Taken" actor Orser will play a weapon-loving scientist named John Sanborn, while "Sons Of Anarchy" actor Esprit will play rebel leader Wayne Ramsey. [EW]
Felicia Day is "Supernatural"-bound. Day is headed back for episode 11 of the CW series as the geeky Charlie Bradbury. [TVLine]
Adam Gregory is headed back to "90210." Gregory is taking another spin around Beverly Hills as bad boy Ty Collins. In Gregory's episode, we'll find out how things would have turned out for Ty if Annie (Shenae Grimes) hadn't moved to town. [TV Guide]
Andrew Dunbar is stopping by "Arrow." Dunbar will portray DC comics character Firefly on the CW series. [EW]
Stephen Collins is headed to "Scandal." The "7th Heaven" alum will guest star as a reporter on a Season 2 episode of the ABC drama. [TVLine]