Anya Reiss Creator, Executive Producer, Writer Romola Garai Mary Actor Oliver Zetterström Edward VI Actor Jamie Parker John Dudley Actor Alicia von Rittberg Queen Elizabeth I Actor John Heffernan Duke of Somerset Actor Jessica Raine Catherine Parr Actor Leo Bill Henry Grey Actor Tom Cullen Thomas Seymour Actor Jamie Blackley Robert Dudley Actor Jacob Avery Guildford Dudley Actor Alex Macqueen Bishop Gardiner Actor Olivier Huband Guzmán de Silva Actor Ekow Quartey Pedro Actor Bella Ramsey Jane Grey Actor Ed Eales White Villager Actor Ruby Ashbourne Serkis Amy Robsart Actor Catherine Morshead Director George Ormond Executive Producer George Faber Executive Producer Tim Phillips Music Tony Miller Cinematographer Joe Sawyer Film Editor Neil McAllister Art Director Bartholomew Cariss Costume Design Lisa Osborne Producer