The Joker - Heath Ledger (A Knight's Tale, Brokeback Mountain, The Order)
Dr. Harleen Quinnzel - Cate Blanchett (Bandits, Lord of the Rings, The Aviator)
Harvey Dent / Two-Face - Joaquin Phoenix (Walk the Line, Gladiator, Signs)
Gilda Dent - Judy Greer (The Village, American Dreamz, Elizabethtown)
Roman Sionis / Black Mask - Peter Sarsgaard (Jarhead, Shattered Glass, Garden State)
Boss Maroni - Tim Roth (Reservoir Dogs, Rob Roy, Invincible)
Det. Bullock - Ray Winstone (Ripley's Game, King Arthur, The Proposition)
Oswald Cobblepot / Penguin - Timothy Spall (The Last Samurai, Lemony Snicket, The Prisoner of Azkaban)
and, if we see them:
The Riddler - Robert Downey, Jr. (Kiss Kiss Bang Bang, A Scanner Darkly, Good Night and Good Luck)
Alberto Falcone - Jason Schwartzman (Shopgirl, Rushmore, Marie Antoinette)
Selina Kyle / Catwoman - Charlize Theron (The Italian Job, The Devil's Advocate, Aeon Flux)
Bane - Dwayne 'The Rock' Johnson (The Rundown, The Scorpion King, Walking Tall)
Rupert Thorne - Albert Finney (Big Fish, Erin Brockovich, Traffic)