blue grad dress A-Line Spaghetti Straps Floor Length Royal Prom PG740 US0 / Custom Color with its A Navy Blue Halter Front Slit

At the time of the painting's creation, Whistler and his mother lived in London, so the artist decided to submit his picture to the Royal Academy of Arts' 1872 exhibition

Without straps to distract, the neckline draws attention to your collarbone and shoulders

You can also use a gold clutch

Our semi-formal attire guide covers this in detail

If you're unsure which to choose, the dress code on the invitation is the clearest guide: "cocktail attire" means cocktail dress

All you should have on hand is a black suit (a black blazer and trousers will totally do), a white button-up shirt, and black sunglasses to channel that whole "I investigate mysterious alien encounters" energy