Castley ran for the 2019 Australian Federal Election as the Liberal Party candidate for the Division of Fenner and was unsuccessful.
[2] Castley put her hand up for the 2020 Australian Capital Territory election and won one of the five seats in Yerrabi, replacing one of the incumbent Liberals James Milligan.
[8] Castley was born in the rural NSW town of Gunnedah, however grew up in the Canberra suburb of Charnwood.
[11] Castley owned and operated a car yard business that collapsed during the Global Financial Crisis.
Castley is a country music singer that regularly performs at local pubs and clubs in Canberra, and has written her own album Perfect Day.