"The Greatest" is a most unusual biopic in that the subject, Muhammad Ali, actually plays himself in most of the movie. Now, at the beginning, when Cassius Clay wins the Olympic gold, he's played by a different actor. But then it switches in the early 1960s and Ali plays himself. Considering his bigger than life persona, it's not at all surprising he played himself in the picture.
As I mentioned above, the film follows Clay (later, Muhammad Ali) from his Olympic gold to his career at his peak in the 1970s. As a result, you learn little about his early life and don't get to see the sad decline late in his career...which is probably for the best.
So is the film any good? Well, Ali is very good playing himself...and he turns out to be quite a decent actor. The film is not perfect, as sometimes it glosses over Ali's weakness (the many women in his life...both wives and mistresses)...but it does hit important things such as his conversion to Islam, his refusal to fight in Vietnam and his major boxing matches. In the latter case, they chose to show footage of the actual matches and fortunately they don't show too much...choosing instead to focus on his life outside the ring...which was a good choice.
So is it worth watching? Yes. It's definitely a film for anyone who wants to see Ali at his best and most famous period of his life.
By the way, it didn't harm the film much but having James Earl Jones playing Malcolm X was a mistake. While an amazing actor, he didn't look nor talk much like the man. It is interesting they chose Jones, however, at he played Alex Haley who was interviewing Malcolm X in "Roots: The Next Generation".
