- Jessica Raine - Catherine Parr
- Alexandra Gilbreath - Kat Ashley
- Tom Cullen - Thomas Seymour
- Matthew Steer - William
- Ryan Nolan - Richard
- Olivier Huband - Guzmán de Silva
- Bella Ramsey - Jane Grey
- Shaun Mason - Priest
- Jamie Blackley - Robert Dudley
- Jacob Avery - Guildford Dudley
- Miltos Yerolemou - Tutor
- Kenny Fullwood - Messenger
- Luke Rollason - King's Player
- Martin Bassindale - King's Player
- Ben Moor - Doctor
- Alex MacQueen - Bishop Gardiner
- Stanley Townsend - Anthony Denny
- Beth Goddard - Joan Denny
- Nicholas Bishop - French Ambassador
- Robert Whitelock - Robert Kett
- Bohdan Poraj - John Robsart
- Lucy Speed - Elizabeth Robsart
- Ruby Ashbourne Serkis - Amy Robsart
- Alfie Todd - Edward Seymour
- Poppy Shepherd - Peasant Woman
- Ed Eales White - Villager
- Oliver Bennett - Court Physician
- Michael Webber - Yeoman Guard
- Jade Taylor
- Tiago Petrica
- George Ormond
- Dathyl Evans
- Owen Twort
- George Faber
- Lisa Osborne
- Ian Wilkinson
- John Mooney
- Tim Phillips
- Ed Marquis
- Catherine Thomas
- Jim Goddard
Alicia von Rittberg interpreta a Elizabeth I of England en la serie.
Romola Garai interpreta a Mary Tudor en la serie.
Oliver Zetterström interpreta a Edward VI of England en la serie.
John Heffernan interpreta a Edward Seymour en la serie.
Jamie Parker interpreta a John Dudley en la serie.
Leo Bill interpreta a Henry Grey en la serie.
Ekow Quartey hace el papel de Pedro de Negro.
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