Role reversal

What's the worst example of a star being nominated for the wrong role?

• Cate Blanchett, Best Supporting Actress, "The Aviator" (2004)
• Patricia Clarkson, Best Supporting Actress, "Pieces of April" (2003)
• Leo DiCaprio, Best Actor, "Blood Diamond" (2006)
• Catherine Keener, Best Supporting Actress, "Capote" (2005)
• Harvey Keitel, Best Supporting Actor, "Bugsy" (1991)
• Nicole Kidman, Best Actress, "Moulin Rouge" (2002)
• Jack Nicholson, Best Actor, "As Good As It Gets" (1997)
• Joaquin Phoenix, Best Supporting Actor, "Gladiator" (2000)
• John C. Reilly, Best Supporting Actor, "Chicago" (2002)
• Susan Sarandon, Best Actress, "The Client" (1994)
• Emma Thompson, Best Actress, "Sense and Sensibility" (1995)