Oh flashbulbs, you naughty things, you.

Mia Wasikowska is the latest in a long line of celebs to unknowingly present their undies for the entire world to see.

On Tuesday evening, the Austraian attended the Tracks premiere at the Toronto International Film Festival in a hot pink Azzedine Ala a dress that suddenly rendered itself sheer under the dazzling glare of flashes.

Beneath her frock, Mia wore a two-tone bra with rhinestone trim and matching panties.

Fancy!

We can’t help but admire the sparkle, and we’re sure Jesse Eisenberg can’t either!

[Image via Getty Images.]