Name the 8 Men Who Won Best Actor Twice

Last night, Daniel Day-Lewis became the first person to win an Oscar for Best Actor three times. Eight other men have won it twice. How many can you name in two minutes?
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Name the 8 Men Who Won Best Actor Twice
Spencer Tracy [Captains Courageous (1937) and Boys Town (1938)]|Spencer Tracy|Tracy
Marlon Brando [On The Waterfront (1954) and The Godfather (1972)]|Marlon Brando|Brando
Gary Cooper [Sergeant York (1941) and High Noon (1952)]|Gary Cooper|Cooper
Tom Hanks [Philadelphia (1993) and Forrest Gump (1994)]|Tom Hanks|Hanks
Dustin Hoffman [Kramer vs. Kramer (1979) and Rain Man (1988)]|Dustin Hoffman|Hoffman
Jack Nicholson [One Flew Over The Cuckoo's Nest (1975) and As Good As It Gets (1997)]|Jack Nicholson|Nicholson
Fredric March [Dr. Jekyll and Mr. Hyde (1932) and The Best Years of Our Lives (1946)]|Fredric March|March
Sean Penn [Mystic River (2003) and Milk (2008)]|Sean Penn|Penn