This one-expression-actress is doing a bang up job of keeping Lev Kuleshov's theory alive.
He would've loved her..."Don't show any emotion, aaaaand action!...perfect!...and then I'm just gonna cut from your dead face to a bowl of soup...oh yes, you're soooo hungry, aren't you?. And now I'm gonna cut from your blank face to a dead woman...you're sad she's dead, aren't you? And last I'm gonna cut from your expressionless face to a baby holding a teddy bear...you really wanna hold that baby, don't you?...Perfect, Cody! You didn't blink or smile or anything, nothing was going on behind your eyes...Can you believe I actually thought about using a dead body to do this little experiment, but you're so much better!."