A first full trailer has arrived for Stephen Frears' "Muhammad Ali's Greatest Fight," centering on Heavy Weight champ Ali's 1967 decision to refuse to enlist for Vietnam service -- which had legal ramifications all the way to the Supreme Court. Christopher Plummer, Danny Glover, Frank Langella and more star. Watch below.
Frears ("Philomena," "The Queen") made the decision to not cast an actor to play Ali -- instead, only archival footage of the famed boxer is used in the film. Glover plays Supreme Court Justice Thurgood Marshall, Plummer plays Justice Marshall Harlan and Langella is Chief Justice Warren Burger. Ed Begley Jr., Bob Balaban, Kathleen Chalfant and Barry Levinson also star.
After premiering at Cannes earlier this year, the film will debut October 5 on HBO.