Kym Warner is an Australian musician and record producer, and a founding member of the American bluegrass band The Greencards.

[1] The winner of the Australian National Bluegrass Mandolin Championship for four consecutive years, Warner had toured with country music artists Gina Jeffreys, and with Young again in Kasey Chambers's band.

[4][5] Warner was producing an album for the recording artist Bill Atkins, and found they needed a fiddle player, which led to the recruitment of McLoughlin.

[5] Representative of an emerging "newgrass" movement, The Greencards' acoustic sound was said to incorporate eclectic influences from Irish traditional, European gypsy, and Latin American sources.

Warner credited the frantic pace of their performance schedule during their Austin formation for their cohesion as a group and for driving them to create more new original music.