Marta Nieto Martínez was born on 31 January 1982 in Murcia to parents from Cartagena. She developed a vocation for acting at the Maristas School in her native Murcia. She trained her acting chops at Murcia's Escuela Superior de Arte Dramático [es] (ESAD-Murcia). She also studied a degree on Spanish philology but did not finish it.