Mena Suvari Butt Exposed In Sheer Dress? (PHOTOS)

Unfortunately, it's the sort of thing you learn the hard way: even black bottoms can be sheer.

Mena Suvari stepped out on Monday night, all dolled up for a screening of "American Reunion" in London. But when the star bent over to autograph some photos for her fans, her gauzy black dress might have revealed a bit more than she intended (we think -- then again, wardrobe "malfunctions" seem more and more purposeful these days).

It was rather unfortunate, considering we're totally digging the LBD otherwise. The drape in the back and the inset pattern on the front are both super chic, as is Mena's tasteful updo.

(On another note: who knew Mena had such a giant tattoo on the back of her neck?)

See Suvari's possible wardrobe mishap (and more celebrity clothing malfunctions) below.


See more celebrity wardrobe malfunctions!

Celebrity Wardrobe Malfunctions (NSFW)