Here's a cast list for Season 3 of The Crown
It was judiciously cribbed from IMDB
Olivia Colman — Queen Elizabeth II
Tobias Menzies — Prince Philip, Duke of Edinburgh
Ben Daniels — Lord Snowdon
Marion Bailey — Queen Elizabeth the Queen Mother
Jane Lapotaire — Princess Alice
Josh O'Connor — Prince Charles
Erin Doherty — Princess Anne
John Lithgow — Winston Churchill
Charles Dance — Lord Mountbatten
Jason Watkins — Harold Wilson
Derek Jacobi — Duke of Windsor
Samuel West — Anthony Blunt
David Rintoul — Michael Adeane
Charles Edwards — Martin Charteris
Angus Wright — Martin Furnival Jones
John Hollingworth — Porchey
Mark Lewis Jones — Edward Millward
Michael Simkins — Patrick Dean
Rupert Vansittart — Cecil King
Colin Morgan — John Armstrong
Ifan Huw Dafydd — Howell
Martin McDougall — W. Marvin Watson
Tim McMullan — Robin Woods
Michael Thomas — Duke of Gloucester
Sinead Matthews — Marcia Williams (as Sinéad Matthews)
Andrew Buchan — Andrew Parker Bowles
Henry Pettigrew — Neil Armstrong
Richard Harrington — Fred Phillips
Penny Downie — Duchess of Gloucester
Felix Scott — Buzz Aldrin
Harry Treadaway — Roddy Llewellyn
David Wilmot — Arthur Scargill
Michael Maloney — Edward Heath
Paul Hilton — Michael Straight
Togo Igawa — Emperor Hirohito
Gwyneth Keyworth — Gwen Edwards
Nancy Carroll — Anne Tennant
Julian Glover — Cecil Boyd-Rochfort
Richard Teverson — Colin Tennant
Jonathan Broadbent — James Burke
Lucas Hare — John Barratt
Harry Gostelow — Mountbatten's Valet
Martin Wimbush — Dr. Bodley Scott
Miltos Yerolemou — Chronos
Patrick Ryecart — Duke of Norfolk
Clifford Rose — Dean of Windsor
Jasper Jacob — Bank of England Lawyer
Mark Dexter — Tony Benn
Alan David — Ben Bowen Thomas
Patrick Toomey — Philip's Private Secretary
Pip Torrens — Tommy Lascelles
Teresa Banham — Mary Wilson
Lorraine Ashbourne — Barbara Castle
Jim Creighton — MI5 Officer
Nigel Whitmey — Marquis Childs
Roger Evans — Editor
Anthony O'Donnell — Mayor of Merthyr Tyfdil
Guy Oliver-Watts — Lord Chamberlain
Tony Bell — Guardian Editor
Colin Stinton — Lawrence E. Spivak
John Finn — Arthur 'Bull' Hancock
Aden Gillett — Richard Crossman (as Aden Gillet)
Stuart McQuarrie — George Thomson
Alasdair Craig — Co-Pilot
Kevin Eldon — Priest Michael
Tim Bentinck — John Betjeman
Gerrard McArthur — Garter at Arms
Sam Parks — Priest 2
Michelle McTernan — Local Woman 3
Mark Lewis — Local Man 1
Andrew Joseph — Jazz Band Musician
Penelope McGhie — Henrietta Woods
Simon Armstrong — Councillor
Nicholas McGaughey — Supervisor
Helena Bonham Carter — Princess Margaret
Clancy Brown — Lyndon B. Johnson
Geraldine Chaplin — Wallis Simpson
Emerald Fennell — Camilla Shand
Nia Roberts — Silvia Millward
Jack Parry-Jones — Teacher
Matthew Baldwin — Kenneth Harris
Andrew Lee Potts — Michael Collins
Dyfrig Morris — Thomas Edwards
Jessica De Gouw — Lucy Lindsay-Hogg
Robert Wilfort — Documentary Director
Peter Straker — Elevator Operator
Sam Phillips — Equerry
Sidney Jackson — Prince Edward
Charlotte Gray — Beryl Moss
David Summer — Thomas Parry
Marlo Woolley — Prince Andrew
Stephen Riddle — Derek Parker Bowles
Suzanne Kopser — Ladybird' Johnson
Alison Jones — Mary Phillips
Clayton T. Smith — American General
Judith Alexander — Ann Parker Bowles
Pierre Azéma — French Doctor
Bea Stevens-Johnson — Sarah Edwards
Fred Broom — Cliff Michelmore
Mark Field — Cavalry Officer
Robert Benedetti-Hall — Major Bruce Shand
Ashley Hope Allan — Peebles Shop Assistant
Charlie Baron — Rhys Edwards
Daniel Beales — Patrick Moore
Dominic Andersen — Camilla's Date
Henry Dimbleby — Richard Dimbleby
Jacob Shephard — Page
Kirsty MacLaren — Violet
Nesba Crenshaw — Rosalind Shand
Alan Gill — Winkie
Ana Morgan — Helen Edwards
Ben Stylianou — Pawnbroker
Dan Renton Skinner — Alastair Burnet (as Dan Skinner)
Monty D'Inverno — RAF Officer
Peter Ormond — Captain
Philippe Smolikowski — Alec Head
Johnny Vivash — Mustique Photographer
Louis Zegrean — Yount Ted Heath
Peredur Hedd Llywelyn — Geraint Moss
Pippa Winslow — Blinkie
Robert Powell Jones — Andras Millward
Verity Russell — Young Elisabeth
Alice White — Bethan
Andrew Cullum — Race Commentator
Beau Gadsdon — Young Margaret
Connie M'Gadzah — Sydney Johnson
Ruby Richardson — Young Ted Heath's Mother
William Ellis — Queen's Flight Captain
Guy Chambers — Pianist
Hugh Thomas — Bishop of Llandaff
Richard Sutton — Gunnery Instructor
Chris Kyriacou — Police Chief
Christopher Naylor — Lord Snowdon's Valet
Dafydd Hywel — Shopkeeper
Fyfe Dangerfield — Pianist
Matthew Steer — Wilson's Aide
Anthony Brophy — James Jesus Angleton
Claire Jeater — Receptionist
Georgina Strawson — Buckingham Palace Maid
Jonathan Coote — Priest 1
Nicholas James Mead — Jazz Band Musician
Rebecca Harries — Local Woman 1
Richard Walsh — Joe Gormley
Catrin-Mai Huw — Local Woman 2
Finn Elliot — Young Philip
Graham Vanas — Doorman
Luke Juby — Jazz Band Musician
Andrew Buckley — Priest 3
Jamie Chapman — Reporter
Leonie Benesch — Princess Cecilie
Luke Stenner — Jazz Band Musician
Milly Thomas — Mirror Group Secretary
John Vaughan — Mountbatten Staff
Michael Parker — Documentary Narrator
Richie Garrison — Jazz Band Musician
Simon Connolly — Marvin Miles
James Sobol Kelly — American Journalist 1
Rhys Parry Jones — Local Man 2
Richard Shanks — Clarence House Equerry
David Charles — George Thomas
Grahame Fox — Worker 1
Lucy Newman-Williams — American Journalist 2
Dai Tabuchi — Japanese Journalist
Jason May — Worker 2
Olivier Raynal — French Journalist
Simon Nehan — Worker 3
Charlie Richards — Queen's Page
Steven Elliot — Geoffrey Morgan
David Rees Talbot — Alun Jenkins
Lynn Hunter — Colliery Secretary
Marian Lorencik — Soviet Diplomat (uncredited)
Stephen Samson — Lieutenant Colonel (uncredited)
Chris Carrico — Documentary Crew (uncredited)
Thibault Charrin — French Stables Man (uncredited)
Christopher Peter Jenkins — BBC Crew Member (uncredited)