Tiyanaks is a 2007 Tagalog-language Action Horror film starring Rica Peralejo, Jennylyn Mercado, Mark Herras, Jc De Vera, Lotlot De Leon, Tj Trinidad and Ana Roces. Against the advice of a concerned mythology professor, a group of school friends decide to take an out of town trip during the holy week.. Tiyanaks was Produced by Lily Monteverde. Tiyanaks is written by Mark A. Reyes, Fairlane Raymundo, Venjie Pellena and Roselle Y. Monteverde and it is directed by Mark A. Reyes and Mark Reyes. Regal Films acquired the distribution rights for the film. Tiyanaks was released on 4th July 2007 in Tagalog and English languages. The motion picture made a box office gross of ₱19 million. Cinematography was done by Jun Aves, Odyssey Flores and J.A. Tadena. The music was composed by Von De Guzman.