Maggie Smith: Scowling dame.
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1991: "Sister Act"
You don't play a character like the Reverend Mother without being perfectly aware you're there to bring your scowly A-game. As the nun who assigns Whoopi Goldberg her undercover sister name (Mary Clarence), Maggie Smith is literally all face. Every other part of her body is obscured. We get a perfectly framed visage punctuated with a treacherous scowl. God bless.