Diaz was born on August 16, 1986 in Puerto Vallarta. In 2006, she made her television debut on, RBD: La Familia in the episode El Que Quiera Azul Celeste. . . Que Se Acueste!. In 2007, she starred in the telenovela Muchachitas como tú, where she played Leticia Hernández. Ariadne was also cast in the dual co-protagonist/antagonist role of Florencia Echevarria de Belmonte in Al diablo con los guapos.