Chelsea Halfpenny
Halfpenny's professional acting career began in 2004 when she appeared in "Casualty" episode ""What Parents Do"", playing an eleven-year-old girl called Karine.
Lily Chao
Lily was first introduced to viewers via the official "Casualty" website through a trailer. Three days later the BBC formerly announced her casting and released a series of promotional pictures of Yu on-set and in character. She was billed as a junior doctor with a bad bedside manner who would annoy all of her colleagues. Yu had previously appeared in the show as a guest character Mingmei Ducheng for one episode in 2010. Of her casting Yu stated: "It’s such a privilege to be joining the cast of BBC One’s Casualty. [...] I am really enjoying all of the medical jargon and being taught the various techniques." Executive producer Oliver Kent said that Lily and fellow new character Rita Freeman (Chloe Howman) "hit the ground running and are set to create a stir in the ED". The character is introduced during the series twenty-eight episode "Bedside Manners", broadcast on 3 August 2013.