Apple's family has roots in entertainment. Born in New York City, she is the daughter of singer Diane McAfee and actor Brandon Maggart. Her older sister, Amber, sings cabaret under the stage name Maude Maggart. Her half brother Spencer is a director and directed the video for her single "Parting Gift". Her half brother Garett Maggart starred in the TV series The Sentinel. In addition, her maternal grandparents were Millicent Green, a dancer with the George White's Scandals, a series of 1920s musical revues similar to the Ziegfeld Follies, and Johnny McAfee, a multireedist and vocalist of the big band era; her grandparents met while touring with Johnny Hamp and his Orchestra.