But the design is so classic that it's super easy to find without resorting to dropping major cash for the Tom Ford original!
We found two equally affordable options that are super similar to Kate's dress.
Check 'em out ...AFTER THE JUMP!!!
As if we'd expect anything else!
She kept everything else simple, apart from drop earrings and a ring by Vhernier, which was perfect considering how vibrant the stark white hue against her bronzed skin look.
The backless portion of the ensemble was really the hit of the night, which she so beautifully demonstrated (below).
Ahhh, much like ambrosia, Alessandra is like a sweet honey drink that soothes the senses.
[Image via Ivan Nikolov/WENN.]