Julia Frith is the granddaughter of Michael Frith, the former executive vice-president and creative director of The Jim Henson Company, and Kathryn Mullen, the actress and puppeteer who is known for her iconic characters Mokey and Cotterpin Doozer in Fraggle Rock, Kiera in the Dark Crystal, and who brought Yoda to life with Frank Oz in The Empire Strikes Back.