Ben Kingsley - Performance of a lifetime
I'm surprised no one's talked about his tour de force performance. It's so beautifully nuanced.
And considering he plays Gandhi from the age of 22 to his last day at the age of 78. What a feat to perfectly portray a man from different stages of his life. This performance at the least rivals any other great performances and could arguably be the best acting you'll ever witness. It should be studied thoroughly in acting classes.
And respects to Günther Maria Halmer who played the wife of Gandhi. She also did wonderful job.