Whitford played Josh Lyman, the deputy chief of staff. Whitford won an Emmy for the series in 2001, while Janney won four, in 2000, 2001, 2002 and 2004.

Allison Janney opened up about her relationship with 'The West Wing' costar Bradley Whitford. She told PEOPLE he's 'family to' her. The pair are set to reunite on 'The Diplomat.' ...

In the new season, Whitford, 65, will be introduced as Grace’s husband, Todd Penn. “That was a dream come true for us to be together again because he's family to me,” Janney told PEOPLE.