Antonia Mary Prebble (born 6 June 1984 in Wellington) is a New Zealand actress, best known for her role as Loretta West in the hit NZ comedy-drama Outrageous Fortune, as Trudy in The Tribe, and as Jane in The Blue Rose. Internationally she's best known for her role as Clare Langtree, the Gatekeeper in Power Rangers Mystic Force.

She is currently portraying Rita West in the television programme Westside and Edie Flanagan in the Australian TV programme Sisters.