Parker Posey is heading to 'The Good Wife.'

According to TVLine, Posey will play the estranged wife of Alan Cumming's character, Eli Gold. Viewers have already met their daughter, Marissa (Sarah Steele).

Posey recently guest starred on NBC's 'Parks and Recreation' and will soon appear on Showtime's 'The Big C.'

In other 'Good Wife' casting news, Diane Lockhart (Christine Baranski) may be getting a younger beau. According to Vulture, Bill Heck will play a young legal aid lawyer who connects with Diane after presenting her with an award for her pro bono work.

And a third guest star, 'House''s Peter Jacobson, will appear in the third season premiere, which is set to air Sun., Sept. 25 at 9PM. Watch CBS's new promo here. Posey's episode is set to air in October.

In other casting news ...

Tom Scavo's new girlfriend on 'Desperate Housewives' has been revealed. Jessica Hecht will appear on the primetime soap in the recurring role. [TVLine]

'V' star Joel Gretsch has booked a recurring 'Playboy Club' role. Gretsch will play the incumbent State's Attorney running for reelection against Nick Dalton (Eddie Cibrian). [Deadline]

Carla Gugino is getting her investigation on. Gugino will star in 'Hide,' a TNT movie about D.D. Warren, a Boston police detective. [THR]

Eric Close has joined the cast of 'American Horror Story.' Close will play Hugo, a character who appears in a series of flashbacks to the 1980s. [TVLine]