It isn't just the way Foxx's voice alters in pitch and speed (he's already discussed the common mistake of going the high-pitched Mickey Mouse route, whereas Tyson's voice "is lower in tone when he's actually speaking"). It's also his mannerisms, the way he squints his eyes, hunches his shoulders, and pushes back his neck as if he's on a swivel-ready for a punch or facing down a bank of cameras at a press conference.

Read the full article on Jamie Foxx's ascent to greatness in Ray at Premiere.