Dean Allan DeBlois (/dəˈblwɑː/ də-BLWAH; born June 7, 1970) is a Canadian director and screenwriter. He is best known as the writer and director of the Oscar-nominated animated feature films "Lilo & Stitch" for Walt Disney Animation Studios (co-directed with Chris Sanders), the "How to Train Your Dragon" trilogy for DreamWorks Animation (the first film also with Sanders), and as the director of the documentary film "Heima" about the Icelandic band Sigur Rós.