Universal has dropped the official trailer for the Blumhouse produced horror Happy Death Day [HTDTH]. Jessica Rothe [JROTH] stars as a college student who relives the last day of her life over and over again until she can uncover the identity of her murderer. It's the second YA Groundhog Day this year after Before I Fall starring Zooey Deutch. Happy Death Day opens in theater on Friday, October 13th.