Check out that First Lady leg!

Michelle Obama unveiled her prom picture today on "The Ellen DeGeneres Show" -- where Barack's wife flashes one of her gams in a high-slit gold dress.

"That split was a little high," Michelle said while laughing. "I don't know if I'd let my kids go out with a split that high, so let's not show this at Malia and Sasha."

While on the show, Ellen showed off her prom pic too ... and her dress is a sight to be seen.

Check out the clip below:

Hot Videos