Agustín Sierra, debuted as an actor in 1999 at age 9 in Verano del '98. From 1999 to 2001, he was part of the cast of the youth television series Chiquititas.
Agustín Rueda Sierra (1952–1978) was an anarchist and anti-Francoist activist, member of Confederación Nacional del Trabajo (CNT) and Coordinadora de Presos En Lucha — Prisoners in Struggle Coordinating Body (Copel).