Brett Prebble is an Australian jockey, currently based in Melbourne, Victoria. Having ridden over 1200 career winners, Prebble's most famous win came aboard Green Moon in the 2012 Emirates Melbourne Cup.

The 2012 Emirates Melbourne Cup was the 152nd running of the Melbourne Cup, Australia's most prestigious Thoroughbred horse race. The race, held on Tuesday, 6 November 2012, at Flemington Racecourse, was won by Green Moon, ridden by jockey Brett Prebble, trained by Robert Hickmott, and owned by businessman Lloyd Williams.