Mackenzie Browning is a fictional character from the CBS soap opera The Young and the Restless. The role was most recently portrayed by Kelly Kruger, who portrayed the role from February 19, 2002, to July 1, 2003, and from March 28, 2018, to January 11, 2019. Previously, the role was portrayed by Ashley Bashioum, Nicole Tarantini, Rachel Kimsey and Clementine Ford. Mackenzie is the daughter of Brock Reynolds and granddaughter of Katherine Chancellor. Much of her history revolves around her role in the teen scene of the series, her romance with Billy Abbott, and marriage to J.T. Hellstrom.