Gallagher will play Irving Carver, a witty and sophisticated attorney who has been dispatched to Lockhart/Agos/Lee by his client, conservative billionaire Reese Dipple (recurring guestOliver Platt). Irving favors a civilized and intelligent debate over bullying but is not afraid to do whatever it takes to make sure the firm is pushing his client's agenda forward.
Platt recurred last season on the series, sharing many scenes with Diane (Christine Baranski). However, he is now a series regular on the freshman NBC medical drama Chicago Med.
Co-creators and co-showrunners Robert and Michelle King revealed to THR in an interview in May that they had a backup plan if Platt was unable to return in season seven.
"There was this wonderful relationship we saw being developed in the later half of the year with Christine Baranski's character, Diane, and Oliver Platt. We're going to either develop that relationship more or bring in someone from Oliver Platt's world that will continue that relationship with Diane," said Robert King.
Gallagher joins Margo Martindale and Jeffrey Dean Morgan as new additions for the upcoming season. The series recently said farewell to three series regulars: Archie Panjabi, Matthew Goode and Makenzie Vega. Vega will continue to appear in a recurring role.
Gallagher recurred on the most recent season of Law & Order: SVU. His other credits include Covert Affairs andThe O.C.
The Good Wife's new season premieres at Sunday, Oct. 4 at 9 p.m. on CBS.