Aarón Díaz lived several years in Palo Alto, California. He finished high school in Palo Alto, before returning to Mexico to study at the exclusive Televisa Acting School Centro de Educación Artística (CEA).
He plays drums and likes singing; he especially likes listening to the music of Carlos Santana. He is also active in sports, he likes soccer and swimming.
He made his acting debut in the popular teen drama Clase 406. In 2004, he followed Clase with another teen drama titled Corazones al límite co-starring Sherlyn and Sara Maldonado. Díaz's latest work was in the telenovela Barrera de amor starring Yadhira Carrillo. He is currently starring along former flame Sherlyn in Mexico's own version of Grease entitled Vaselina.
Apart from acting, Díaz is also a singer and hopes to release a hip hop album sometime in the future. Diaz signed on in 2006 with Pedro Damian, (creator of Clase 406' ) for the teen telenovela called Lola...Érase una vez, which premiered on February 26, 2007 on "Canal 5" in Mexico.
Díaz has dated Sherlyn, with whom he was co-starring in Clase 406 and Corazones al Limite. He has also dated Kate del Castillo, who he had an on-again off-again relationship with for two years. They are currently back together and on August 29, 2009 they got married in Las Vegas at Viva Las Vegas chapel accompanied by friends. On September 5, they married in San Miguel de Allende, Guanajuato in the Episcopal church.