Zak Penn is an American screenwriter and director better known for his work on X-Men: The Last Stand, The Grand and Alphas. He was one of the screenwriters working on the script for the Pacific Rim sequel with Guillermo del Toro before the production's delay in 2015.
Penn graduated from Wesleyan University in 1990. His screenplay for PCU was based on his experiences at the Eclectic Society house. He is the son of New York businessman and lawyer Arthur Penn, who led the acquisition of the Capital Markets Assurance Corporation from Citicorp.