Kym Warner is an Australian musician and record producer, and a founding member of the American bluegrass band The Greencards. Warner was an aspiring bluegrass player after inheriting the bug from his father, an early Australian bluegrass pioneer. The winner of the Australian National Bluegrass Mandolin Championship for four consecutive years, Warner toured with country music artists Gina Jeffreys, and with Young again in Kasey Chambers's band.