Uma Thurman powder face

Uma Thurman's beauty blooper. Photo: George Napolitano/WireImage.com

Uma Thurman gave flour power a whole new meaning.

The actress, speaking at the Feminist Press at the City University of New York's 40th annual gala, turned up at the Oct. 18 event with her face patched with powder!

Thurman's makeup mishap was clearly visible under the glaring lights of the stage, reports the Daily Mail.

In fact, the 40-year-old's usually flawless face appeared to be antiqued by hints of dust on the tip of her nose, around her eyes, and at her hairline.

What, no cobwebs?

While it is quite possible that the mother of two might have been enthusiastically baking a cake before the gala, it seems more likely that her unpolished appearance was the work of an overzealous makeup artist, reports the Daily Mail.

On the plus side, at least the "Kill Bill" star didn't have to worry that her nose was shining. Not even Rudolph's honker would glow beneath all that snow.

Click here to learn how to look hot without tons of makeup.

In other celebrity beauty news, read Julianne Moore's take on plastic surgery in the November issue of Allure.