Stars attended a preview of "Sleep" in Seoul on Monday ahead of its release next month.

The film starring Lee Sun-kyun and Jung Yu-mi revolves around newlyweds whose lives descend into horror due to the husband's strange behavior while sleeping.

The first feature film by Yu Jae-sun, a former assistant director to Oscar-winning director Bong Joon-ho, was invited for screening at the Cannes Film Festival in May.

It will hit theaters here on Sept. 6.