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.
Characters of Casualty
Constance "Connie" Beauchamp played by Amanda Mealing, originally appeared in Casualty's spin off show, Holby City, in the role of Cardiothoracic Consultant and Clinical Lead of Holby's Darwin Cardiothoracic Ward. Connie later went on to become Director of Surgery and Medical Director of Holby City Hospital. During this period, she appeared in the first two crossovers between "Casualty" and "Holby City", featuring the casts of both shows, and made a guest appearance in the "Casualty" episode shown 9 September 2007. She departed from the show in its thirteenth series, resigning from her post. Her return was announced on 23 July 2013 and she arrived in Casualty on 29 March 2014.
Mackenzie "Big Mac" Chalker played by Charles Dale first appeared on 24 November 2007. He was a porter until October 2013, when he applied to become an emergency care assistant. However, he quit this role in November 2014 and applied to be a healthcare assistant instead. He hasn't changed his job role since. Dale's departure was announced on 7 June 2016, after eight and a half years on the show. Big Mac's exit airs on 11 June 2016 when he decides to leave Holby. Dale since revealed he would return for a cameo appearance in the show's thirtieth anniversary specials.