Eggert was born in Glendale, California. Her mother, Gina Duncan, was a British-born talent agent, and her father, Rolf Eggert, was a German-born canning-company executive.
Born in Glendale, California, Eggert's parents were from different countries: her mother, Gina Duncan, was British with experience in talent management, and her father, Rolf Eggert, was German with expertise in the canning industry.