Justin David Swibel and Guillermo del Toro are both what?
Justin David Swibel: Justin David Swibel (born April 1, 1983) is an American screenwriter, director, and producer. Guillermo del Toro: Guillermo del Toro Gómez (] ; born October 9, 1964) is a Mexican-American film director, screenwriter, producer and novelist.
screenwriter