As themselves: Jonathan Alter, H. W. Brands, Doris Kearns Goodwin, Edna Gurewitsch, Clay S. Jenkinson, William Leuchtenburg, David McCullough, Jon Meacham, Patricia O'Toole, Geoffrey C. Ward, and George Will.
Other voices include: Adam Arkin, Keith Carradine, Kevin Conway, Ed Harris, Josh Lucas, Carl Lumbly, Amy Madigan, Carolyn McCormick, Pamela Reed, Billy Bob Thornton, and Eli Wallach.