I can't give more than three stars because to me the Great Man is not a very good film actor. His performances are overly broad for the big screen and his "technique" always shines through. These facts are never more in evidence than in this film. I am, admittedly, in the minority in this assessment but there you have it.
This original "Game of Thrones" adapted Shakespeare's play to the screen for the first time with director Laurence Olivier relishing the title role. Richard's conniving concoctions are a pleasure to see play out as characters are dispatched in diverse yet artful manners. John McCorry worked overtime in ornamenting the cast, arranged like flowers in this Technicolor framing.
Works best when Olivier is conniving straight down the pipe, but falls apart a bit in the climactic battle when the audience's intimacy w/Richard is betrayed for sword & horse (a kingdom for!) spectacle. Still, Olivier is the best--not that the supporting cast is anything to sneeze at. Olivier's direction is intuitive & graceful; set & costume design all technicolor exaggeration & stylized surrealism.
A weaker film than Olivier's Henry V and Hamlet, but at least we have the evil Richard that the current Ricardian propagandists want made a saint. "Foul devil, for God's sake, hence, and trouble us not; For thou hast made the happy earth thy hell, Fill'd it with cursing cries and deep exclaims. .. Either heaven with lightning strike the murderer dead, Or earth, gape open wide and eat him quick."