Hoover, a controversial figure who ran the bureau for nearly forty years, won't be as easy to cast as Mandela. There's not a single person perfectly fit for the part, like Morgan Freeman was for the South African leader. But if Eastwood does direct this biopic, I could maybe see Matt Damon, who co-starred in "Invictus" and leads Eastwood's next film, "Hereafter," in the role.

Of course, that might be a little weird after Damon starred as a major figure in Robert De Niro's "The Good Shepherd," about the history of the CIA. Plus I also think he's a little busy right now, starring in seemingly every movie connected with Steven Soderbergh ("Contagion") and "Bourne" director Paul Greengrass ("Green Zone").

Plenty of people have played Hoover, who has been depicted in film for more than 50 years now. Memorable actors to take on the role include Ernest Borgnine, Bob Hoskins, Kevin Dunn, Vincent Gardenia, Pat Hingle and Dorothi Fox, who played the FBI director as a large African-American woman in Woody Allen's "Bananas." Billy Crudup (also in "The Good Shepherd") was the most recent person to play him on the big screen, in last summer's "Public Enemies," though even before Imagine's full biopic goes before cameras we'll potentially see another portrayal in an upcoming crime film titled "No God, No Master."

Would you like to see Clint Eastwood direct this biopic? Who should be cast as J. Edgar Hoover?