Madison Elle Beer was born on March 5, 1999, in Jericho, New York, an affluent hamlet in Nassau County on Long Island. Her parents, Robert Beer and Tracie Beer, established deep residential roots in the region. Robert Beer worked as a luxury home builder and general contractor, while Tracie built a career in interior design.
Growing up alongside her younger brother, Ryder, Madison spent her formative years within a community shaped by strong cultural traditions. Long Island's North Shore is home to substantial Jewish populations, and her family life reflected that environment. Although her parents divorced during her childhood, both remained active participants in her upbringing.
Her early years were steeped in traditional milestones. In 2012, shortly before Justin Bieber discovered her YouTube cover videos and propelled her into international fame, she celebrated her Bat Mitzvah. The event, themed around Alice in Wonderland, reflected a quintessential Long Island celebration marking passage into Jewish adulthood. Her cultural identity was never ambiguous to those who knew her locally; it was an established part of her everyday life.