If the film rights were purchased by a production company, this is who I'd suggest for the main characters... (Historical figure pics on the left, Hollywood casting on the right).
Anne "Stanhope" Seymour--Lady Viper -- played by Lena Headey
Edward Seymour--Anne's husband and brother to Queen Jane Seymour--played by Eric Bana
Anthony Browne--Anne's lover and a courtier in Henry VIII's court--played by Henry Cavill
Henry Howard, Earl of Surrey--my villain, Anne's tormenter--played by Oliver Coleman
King Henry VIII--played by Kevin McKidd
Queen Jane Seymour--played by Rebecca Ferguson
My Lady Viper is available for purchase now in print/ebook (audio coming this summer!).
May, 1536. The Queen is dead. Long live the Queen.
When Anne Boleyn falls to the executioner's ax on a cold spring morning, yet another Anne vows she will survive in the snake-pit court of Henry VIII. But at what cost?
Lady Anne Seymour knows her family hangs by a thread. If her sister-in-law Jane Seymour cannot give the King a son, she will be executed or set aside, and her family with her. Anne throws herself into the deadly and intoxicating intrigue of the Tudor court, determined at any price to see the new queen's marriage a success and the Seymour family elevated to supreme power. But Anne's machinations will earn her a reputation as a viper, and she must decide if her family's rise is worth the loss of her own soul...