From the novels of Philippa Gregory, the Starz drama series The Spanish Princess follows Catherine of Aragon (Charlotte Hope), the 17-year old promised in marriage to the English Prince Arthur (Angus Imrie), in an arrangement meant to form an alliance between the two nations. When her husband dies suddenly, the throne that she’s been promised since she was a child seems lost, until she sets her sights on Prince Harry (Ruairi O’Connor), who will one day become King Henry VIII. During this 1-on-1 interview with Collider, actress Laura Carmichael (who plays Maggie Pole, the aunt …