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Hilary Swank's hairy situation. Photo: Marcocchi Giulio/SIPA

Well ain't that the pits.

Proving that you can win two Oscars yet still struggle with basic grooming practices, Hilary Swank flashed hairy underarms at Elle Magazine's Women in Hollywood Tribute last night.

One of Elle's November cover girls, Swank looked otherwise glam at the event thanks to a retro wavy updo, sexy bronzed glow, curve-hugging gold bustier dress from Calvin Klein, strappy ruby Christian Louboutin heels, Judith Leiber clutch, and David Yurman jewelry...

That is, until she lifted her arm and revealed enough hair to make a mini Donald Trump comb-over.

The "Conviction" actress isn't the only Oscar winner to go hirsute lately. Mo'Nique has famously rocked hairy legs on the red carpet, while Julia Roberts also went razor-less for the "Notting Hill" premiere.

So, what gives? Is there some sort of Nair shortage in Hollywood, or is Swank gearing up for "Boys Don't Cry 2"? Or did Mr. Miyagi not give her the whole "wax on, wax off" speech during "The Next Karate Kid"?

Meanwhile, check out Swank's style evolution.

Click here for 10 more famous ladies who rocked arm pit hair.