Timothy Blake Nelson is an American actor and playwright. Described as a "modern character actor", his roles include Delmar O'Donnell in O Brother, Where Art Thou? (2000), Gideon in Minority Report (2002), Dr. Pendanski in Holes (2003), Danny Dalton Jr. in Syriana (2005), Samuel Sterns in the Marvel Cinematic Universe, Richard Schell in Lincoln (2012), the title character in The Ballad of Buster Scruggs (2018), and Henry McCarty in Old Henry (2021). He portrayed Wade Tillman / Looking Glass in the HBO limited series Watchmen (2019), for which he received a Critics' Choice Television Awards nomination for Best Supporting Actor in a Drama Series in 2020.

O Brother, Where Art Thou? is a 2000 satirical comedy-drama film written, produced, co-edited, and directed by Joel and Ethan Coen. It stars George Clooney, John Turturro, and Tim Blake Nelson, with Chris Thomas King, John Goodman, Holly Hunter, and Charles Durning in supporting roles.