Cottesloe Theatre The Cottesloe Theatre is the smallest of the National Theatre's three auditoriums. Note: the Cottesloe Theatre closed on February 23 2013 and reopened as the Dorfman Theatre in 2014. Cottesloe Theatre overview An overview of the smallest of the National Theatre's three theatres. Acting in the Cottesloe Simon Russell Beale and Roger Allam talk about acting on the Cottesloe stage. Vocal exploration of the Cottesloe Theatre Jeannette Nelson explores the vocal challenges of the Cottesloe Theatre.