Moira Miller was born in Santiago, Chile on March 1, 1972. She studied acting in Gustavo Meza's Escuela de Teatro Imagen and got her title at ARCOS Professional Institute. As an actor she worked in theater with directors Andrés Pérez and Boris Quercia, and also performed in some television shows, including Playa Salvaje and Fuera de Control (UC-TV). At the same time, she began to work as assistant director in theater for Boris Quercia and also for her father, Hugo Miller. In 1997 she directed her first play, Eric Bogosian's Sex, Drugs, Rock & Roll, winning the Revelation Prize of the Chilean Press Award (APES).