Tim Blake Nelson is an American actor, writer, and director, whose most popular roles include Delmar O`Donnell in O Brother, Where Art Thou? (2000), and Dr. Pendanski in Holes (2003). He was also known to portray the role of Dr. Samuel Sterns in The Incredible Hulk (2008). His popular directorial ventures include Leaves of Grass, and The Grey Zone. He was the writer for the movies Eye of God, Leaves of Grass and Anesthesia. He starred in the 2017 action-comedy movie Colossal, directed by Nacho Vigalondo. His other releases include The Hustle (2019), Angel Has Fallen (2019) and Just Mercy (2020)