Hailee Puring Steinfeld was born in Tarzana, Los Angeles, California, to Cheri (née Domasin), an interior designer, and Peter Steinfeld, a personal fitness trainer. She was raised in a Roman Catholic family and has an older brother, Griffin. Her maternal grandfather was half Filipino, adding to her diverse background. Hailee's early exposure to the entertainment industry through her cousin, True O'Brien, a fellow actress, sparked her initial interest in acting.

Before her breakthrough role, Steinfeld began acting in short films and television commercials. These early experiences, including appearances in 'Back to You' and 'Sons of Tucson,' provided her with valuable on-set experience and helped her hone her craft. These smaller roles were crucial stepping stones toward her future success.