High Quality Content by WIKIPEDIA articles! Zak Penn (born 1968) is an American screenwriter and director who is known for writing and directing Incident at Loch Ness, The Grand and co-writing the script for X-Men: The Last Stand.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.