Favorite supporting actor/actress performances?

[Daddys_Visa]

What are the best supporting actor or actress performances you have seen? I'm thinking of the roles that were so well cast and acted that they practically stole the spotlight from the other actors.

Here are a few of my favorites in no particular order:

John Turturro -- Miller's Crossing
Kathy Bates -- Misery
William H. Macy -- Fargo
Phillip Seymour Hoffman -- Almost Famous
John Goodman -- The Big Lebowski
William Hurt -- From the Hip
Anthony Hopkins -- The Silence of the Lambs
Jack Nicholson -- Batman
Alec Baldwin -- Glengarry Glenross
R. Lee Ermey -- Full Metal Jacket

I could probably go on for a while. I know I am missing some good ones.