Gretel II (KA-3) is an International 12-metre class racing yacht built for the America's Cup challenge series in 1970. She was designed by Alan Payne and built by W.H. Barnett for Australian media tycoon Sir Frank Packer. Packer had first challenged for the America's Cup in 1962 with the yacht Gretel, which was named after his wife. Gretel was competitive but lost that challenge 4–1.