James Christopher Frey is an American writer and businessman. His first two books, A Million Little Pieces (2003) and My Friend Leonard (2005), were bestsellers marketed as memoirs. Large parts of the stories were later found to be exaggerated or fabricated, sparking a media controversy.

His 2008 novel Bright Shiny Morning was also a bestseller. Frey is the founder and CEO of Full Fathom Five. A transmedia production company, FFF is responsible for the young adult adventure/science fiction series The Lorien Legacies of seven books written by Frey and others, under the collective pen name Pittacus Lore. Frey's first book of the series, I Am Number Four (2010), was made into a feature film by DreamWorks Pictures.

He is also the CEO of NYXL, an esports organization based in New York.