Kagan sees her story as one of "reinvention," and she speaks around the country on that topic. Kagan is Jewish. Her great-grandfather was a Russian immigrant named Eiser Cohen who came to the United States through Ellis Island. Cohen settled in Milwaukee, Wisconsin. Her grandfather, Jack Kagan, later moved to the Los Angeles area. Her mother, Phyllis Kagan, is a breast cancer survivor who has appeared on CNN discussing the disease. Kagan has a younger sister named Kallan, an executive at Arc Productions, and an older brother named Mark.