HBO has released the first teaser trailer for director Stephen Frears’ (The Queen) new film Muhammad Ali’s Greatest Fight.  The pic focuses on Muhammad Ali’s refusal to go to Vietnam and the court battle that ensued, centering on Justice Harlan (Christopher Plummer) and his clerk, played by Abraham Lincoln: Vampire Hunter star Benjamin Walker.  This teaser doesn’t show too much footage from the film, but it looks like Ali won’t actually be portrayed onscreen by an actor.  Instead, we see archival footage of the legendary fighter while the narrative plays out in the courtroom and the judge’s chambers.

Hit the jump to watch the trailer.  The film also stars Frank Langella, Danny Glover, Bob Balaban, Ed Begley Jr., Barry Levinson, and Pablo SchreiberMuhammad Ali’s Greatest Fight premieres on HBO on October 5th.