Born in Darwin, Northern Territory in 1987, Miatke began competitive swimming in 1995. She first represented the Northern Territory in 1998 at the national School Sport Swimming and Diving Championships. She first won gold for the Territory in 1999 at the Australian Age Championships, in the 100 metres backstroke in the under13 division. Her coach in the Northern Territory was Jay Davies, from the Northern Territory Institute of Sport.
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Source: Wikipedia