Kate stopped by Letterman last night to promote Holiday but it's her other movie, Little Children, that has created a lot of buzz. In the film she plays an emotionally detached suburban wife who has an affair with her neighbor, played by cutie Patrick Wilson. This movie has already received Oscar buzz and Kate has expressed how much she hated doing sex scenes in the film. Now she is also speaking out about how challenging the character was for her to play. Here's more:

SARAH IS definitely the hardest part I've ever had to play... The emotional journey the character Sarah goes on is epic -- epic for a woman. ... Sarah is isolated, depressed. She feels she lost herself through having a child and marrying the wrong man. She resents the child and has made terrible errors of judgment. The challenge was to embrace playing someone so weak."

We bet Kate did an excellent job since she always seems to impress us on the big screen. For more pics of Kate just

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