The Diplomat (TV) Cast
The cast of The Diplomat. Updated on August 17, 2025.
79 actors
Keri Russell
as Ambassador Kate Wyler (8 episodes)

Keri Russell plays Ambassador Kate Wyler, the new U.S. ambassador to the United Kingdom tasked with handling global diplomatic challenges.

Rufus Sewell
as Hal Wyler (8 episodes)

Rufus Sewell portrays Hal Wyler, the husband of Ambassador Kate Wyler, who is navigating the complexities of his wife's high-profile diplomatic position.

David Gyasi
as Foreign Secretary Austin Dennison (8 episodes)

David Gyasi appears as Foreign Secretary Austin Dennison, a key figure in the British government.

Ali Ahn
as Eidra Park (8 episodes)

Ali Ahn is Eidra Park, contributing to the intricate political environment.

Rory Kinnear
as Prime Minister Nicol Trowbridge (8 episodes)

Rory Kinnear takes on the role of Prime Minister Nicol Trowbridge, the British head of government.

Ato Essandoh
as Stuart Hayford (8 episodes)

Ato Essandoh portrays Stuart Hayford, involved in international diplomatic discussions.

Celia Imrie
as Meg Roylin (4 episodes)

Celia Imrie plays Meg Roylin, a character involved in the unfolding political drama.

Michael McKean
as President William Rayburn (3 episodes)

Michael McKean is President William Rayburn, the U.S. leader balancing domestic and international issues.

Nana Mensah
as Billie Appiah (4 episodes)

Nana Mensah portrays Billie Appiah, contributing to the storyline's diplomatic layers.

Miguel Sandoval
as Miguel Ganon (4 episodes)

Miguel Sandoval plays Miguel Ganon, adding another dimension to the political intrigue.

Jess Chanliau
as Ronnie (8 episodes)

Jess Chanliau takes on the role of Ronnie, impacting the unfolding events.

Pearl Mackie
as Alysse (8 episodes)

Pearl Mackie portrays Alysse, becoming part of the international narrative.

Penny Downie
as Frances Munning (4 episodes)
Adam Silver
as Howard (4 episodes)
Tim Delap
as Byron (6 episodes)
Kenichiro Thomson
as Martin (6 episodes)
Georgie Henley
as Pensy (5 episodes)
Christine Kavanagh
as Gwen Hempill (2 episodes)
Tom Mordell
as Johnny Regis (1 episode)
Ro Kumar
as Ryan Lutt (1 episode)
Tegan Farrelly
as Emily Carollton (1 episode)
Simon Ludders
as Owen (1 episode)
Anna Francolini
as Pippa (2 episodes)
Amy Manson
as Giselle (2 episodes)
Marc James Beauchamp
as Jonathan (1 episode)
Freddie Stabb
as Lucinda (3 episodes)
Gareth Brierley
as Mr. Abbott (1 episode)
David Buttle
as Police Officer (1 episode)
Joey Eden
as Dan (2 episodes)
Reza Diako
as Basir (1 episode)
Bijan Daneshmand
as Rasoul Shahin (1 episode)
Anne Wittman
as Joan Bassett (1 episode)
Arthur Lee
as Don (1 episode)
Richard Dillane
as Tom Libby (2 episodes)
Jacqueline Boatswain
as Elaine Simms (1 episode)
David Yelland
as General Edmund Hillison (1 episode)
Marshall Griffin
as Guard at Winfield Gate (1 episode)
Laurel Lefkow
as Carole (1 episode)
Melissa Advani
as Commentator (1 episode)
Michael Addo
as PM's Security (1 episode)
Diany Samba-Bandza
as Clara (1 episode)
Michael Sheldon
as Nathan (1 episode)
Cara Ballingall
as Mourner (1 episode)
Stacey Norris
as Mourner (1 episode)
John Schwab
as Roger Post (2 episodes)
Leroy Bonsu
as Andrew (1 episode)
Alec Nicholls
as Secretary Leiber (2 episodes)
Elijah Isaiah Cook
as Theo (CIA Officer) (1 episode)
Sharif Dorani
as Parham Hajjar (1 episode)
Dana Haqjoo
as Farid Namazi (1 episode)
Maggie Daniels
as Louisa (1 episode)
Tim Berrington
as Tyler Randall (1 episode)
Simon Chandler
as Sir Merrit Grove (1 episode)
Louise Cole
as Photographer (1 episode)
James Beaumont
as Medic 1 (1 episode)
Tomini Babs
as Medic 2 (1 episode)
Olivia Niță
as Mitzka (1 episode)
T'Nia Miller
as Cecilia Dennison (2 episodes)
Rupert Vansittart
as Hoope (2 episodes)
David Bark-Jones
as Kemper-Waithe (2 episodes)
Bhav Joshi
as Anu Kapoor (3 episodes)
Colin Mace
as Shenk (1 episode)
Adam Silver
as Howard (1 episode)
Colin R. Campbell
as Doctor (1 episode)
Andre Lillis
as Wilson (1 episode)
Ian Drysdale
as Oleg Balakin (1 episode)
Matilda Ziegler
as Olga (1 episode)
Gianna Kiehl
as Carly Green (1 episode)
Catherine Russell
as Jill Klein (1 episode)
Glenn Wrage
as Lewis Quainton (1 episode)
Robert Purdy
as General (1 episode)
Micky Sébastian
as Brielle Fournier (1 episode)
Etienne Guillou-Kervern
as Ralsh (1 episode)
Alan Mahon
as Warren (1 episode)
Adrien Mubu
as Jamil (1 episode)
Brigitte Barilley
as Karoline (1 episode)
Stéphane Ly-Cuong
as Gregoire (1 episode)
Antoine Mathieu
as Minister of Culture (1 episode)
Waseem Mirza
as Secretary of State Miguel Ganon's Aide (1 episode)
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