Gemma Burgess Creator, Writer Emily Bader Jane Grey Actor Edward Bluemel Guildford Dudley Actor Jordan Peters King Edward Actor Robyn Betteridge Margaret Grey Actor Anna Chancellor Lady Frances Grey Actor Rob Brydon Lord Dudley Actor Kate O'Flynn Mary Actor Abbie Hern Bess Actor Henry Ashton Lord Stan Dudley Actor Dominic Cooper Lord Seymour Actor Meredith Glynn Executive Producer, Writer Sarah Bradshaw Executive Producer Laurie MacDonald Executive Producer Alyssa Lerner Writer Bisanne Masoud Writer Jamie Babbit Executive Producer, Director Shepard Boucher Writer Cathy Lew Writer Stefan Schwartz Director