Ruby Spark is a fictional character from the BBC medical drama Casualty, played by Maddy Hill. She first appears in the forty-first episode of series thirty-two, originally broadcast on 14 July 2018. The character and Hill's casting details were announced on 18 January 2018 and she began filming during the following month. For the role, the actress qualified as a Heavy Goods Vehicle (HGV) driver. Ruby is a paramedic and is characterised as a smart, caring and opinionated perfectionist who lacks social skills. Her near-photographic memory of procedures and medication serves as an important character point as she struggles to deviate from the rules. The character's backstory states that she has just graduated from university, adding to her over-emphasis on rules. Ruby is introduced as part o