Sienna Cammeniti is a fictional character from the Australian soap opera Neighbours, played by model Erin McNaught. McNaught was cast in the role to help boost falling ratings in Australia. The character made her first screen appearance on 2 May 2008. Sienna was introduced as the cousin of the established Carmella Cammeniti (Natalie Blair). In July 2008, McNaught took the decision to cut her contract short and Sienna departed on 3 October 2008. During her time on Neighbours, McNaught's casting and acting were negatively received by critics, acting agencies and viewers.