David Klass is an American screenwriter and novelist. He has written more than 40 screenplays for Hollywood studios and published 14 young adult novels. His screenplays are primarily character-based thrillers for adults, while his novels often tell the stories of teenagers in crisis. Klass was born in Vermont and raised in Leonia, New Jersey, the son of Sheila and Solomon Klass, English professor and author, and Dr. Morton Klass, professor of anthropology at Barnard College and the brother of Dr. Perri Klass, a pediatrician, author, educator, and a contributing columnist for The New York Times. His uncle was science fiction author Philip Klass, who wrote under the name William Tenn. Klass attended Leonia High School. He received his BA in History from Yale University in 1982 and later graduated from USC School of Cinema-Television (1989). Klass lives in New York City with his wife, Giselle Benatar, and their two children. Klass has also written more than 40 Hollywood screenplays, including the adaptation of James Patterson's Kiss the Girls for the movie version starring Morgan Freeman and Ashley Judd. His most recent produced screenplay was the remake of Walking Tall starring The Rock. Klass wrote the screenplay for the thriller Desperate Measures starring Michael Keaton and Andy García, which was based on his original idea. With his sister, Judy Klass, he adapted Julia Alvarez's novel In the Time of the Butterflies into the 2001 movie starring Salma Hayek and Edward James Olmos.

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