Nana Mensah just got a big upgrade. She is now a series regular for Season 4 of Netflix’s political drama The Diplomat.

EXCLUSIVE: Nana Mensah has been promoted to series regular for Season 4 of Netflix’s hit political drama The Diplomat. Mensah ...

Mensah joins Allison Janney (Grace Penn) and Bradley Whitford (Todd Penn), who have also been upped to series regulars in the fourth season, which is set to start filming this fall. The Diplomat ...

Nana Mensah will be a series regular in The Diplomat Season 4. The actor has played Billie Appiah, the White House Chief of Staff, since Season 1.