11/10/2011 06:14 pm ET Updated Dec 06, 2017

Kate Middleton, Prince William Get All Dressed Up At St. James's Palace (PHOTOS, VIDEO)

Kate's back out -- and she's dared to bare a shoulder!

The Duke and the Duchess attended a reception today for Britain's National Memorial Arboretum Appeal, of which Prince William is a patron. In honor of the UK's Remembrance Day tomorrow, a dinner was held at St. James's Palace to raise funds for the Arboretum, which honors England's fallen soldiers and war heroes.

Like her sister yesterday, Kate wore a poppy on her outfit as a symbol of remembrance -- luckily, it looked perfectly coordinated with her stunning silver Grecian gown, one of the rare one-shoulder frocks we've seen her in. The dress is by Jenny Packham, a designer who Catherine's donned in the past.

Her hair was also styled in a fresh new way, pulled back on one side to expose an oversized diamond drop earring and left loose on the other (notably, on the side that contains the scar that had the whole beauty world in a tizzy).

What do you think of the gray gown? Check out pics of Kate (and William, but really who cares about a plain old tux?) AND video below!

Kate Middleton in gray one-strap gown