Who Is KK Downey? is a 2008 comedy film directed by Pat Kiely and Darren Curtis. It was produced in Montreal, Quebec, Canada.

Loosely based on the JT Leroy controversy, the film stars Darren Curtis and Matt Silver as Terrance Permenstein and Theo Huxtable, two friends who invent the character of KK Downey, a transgender street prostitute, as the "author" of Theo's novel Truck Stop Hustler after it gets rejected by a publisher because Theo comes across too white and middle-class to be believable as the writer of a book about street life, with Terrance donning drag to play Downey. Kiely also stars as Connor Rooney, a music journalist who becomes suspicious of Downey's story and tries to hunt down the truth.

The film was created through the Montreal comedy troupe Kidnapper Films. Paul Spence, Brent Skagford and Dan Beirne also appear in supporting roles.