Justice Adam Leak is an American film, television and stage actor best known for his portrayal of Harland Osbourne in the 2007 film The Great Debaters.

The Great Debaters is a 2007 American historical drama film directed by Denzel Washington from a screenplay by Robert Eisele and based on a 1997 article for American Legacy by Tony Scherman. The film follows the trials and tribulations of the Wiley College debate team in 1935 Texas. It stars Washington, Forest Whitaker, Denzel Whitaker, Kimberly Elise, Nate Parker, Gina Ravera, Jermaine Williams, and Jurnee Smollett.