Merrit Weaver Cast as a Sibling on The Good Wife

Merrit Weaver is headed to The Good Wife.

The adorable Nurse Jackie star will appear on an upcoming episode as Will's younger sister Audra, TV Line reports, stopping by to irritate her brother about his personal life. Or lackthere of.

Producer Robert kKing describes the character as "irresponsible" and "rebellious." She'll be accompanied by a not-yet-cast older sibling.

Jason Biggs, meanwhile, guest stars on the terrific drama this Sunday. Watch the official CBS promo for his appearance above.