 At Comic @-@ Con International in July 2006 , the 300 panel aired a promotional teaser of the film , which was positively received . Despite stringent security , the trailer was subsequently leaked on the Internet . Warner Bros. released the official trailer for 300 on October 4 , 2006 , and later on it made its debut on <unk> where it received considerable exposure . The background music used in the trailers was " Just Like You Imagined " by Nine Inch Nails . A second 300 trailer , which was attached to Apocalypto , was released in theaters on December 8 , 2006 , and online the day before . On January 22 , 2007 , an exclusive trailer for the film was broadcast during prime time television . The trailers have been credited with igniting interest in the film and contributing to its box @-@ office success . 
