January Jones goes commando on 'Tonight Show'

January Jones wears lace-paneled jumpsuit that would've revealed her underwear had she been wearing any.
By Danielle Haynes Follow @DanielleHaynes1 Contact the Author   |   March 29, 2014 at 4:53 PM

Mad Men actress January Jones made it very clear she wasn't wearing any underwear during her Friday night appearance on The Tonight Show with Jimmy Fallon by wearing a revealing, lacy black jumpsuit.

The head-to-toe jumpsuit was largely modest except for lacy panels along the side that showed plenty of skin and not a lot of something else that should've been there … her underwear.

While on the show, the 36-year-old actress told a mean story of how she pranked her ex-boyfriend from high school -- who's now a realtor -- into thinking she was planning to purchase a $1 to $2 million home from him.

Take a look:

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