 In November 2007, it was announced that model and former Australian Miss Universe representative, Erin McNaught would be joining the cast of "Neighbours" to help boost falling ratings in Australia.Producers also recruited fellow model Imogen Bailey (Nicola West) and former Australian Idol contestant Dean Geyer (Ty Harper) in a bid to "sex up" the cast.McNaught took acting classes in preparation for the role of Sienna and she began filming her first scenes on 17 December.