Amal Clooney is the definition of chic at Prince Charles' swanky event

LONDON, ENGLAND - MARCH 12: Amal Clooney and George Clooney attend a dinner to celebrate The Prince's Trust, hosted by Prince Charles, Prince of Wales at Buckingham Palace on March 12, 2019 in London, England. The Prince of Wales, President, The Princes Trust Group hosted a  dinner for donors, supporters and ambassadors of Princes Trust International. (Photo by Chris Jackson - WPA Pool/Getty Images) ORG XMIT: 775313787 ORIG FILE ID: 1135385743
LONDON, ENGLAND - MARCH 12: Amal Clooney and George Clooney attend a dinner to celebrate The Prince's Trust, hosted by Prince Charles, Prince of Wales at Buckingham Palace on March 12, 2019 in London, England. The Prince of Wales, President, The Princes Trust Group hosted a dinner for donors, supporters and ambassadors of Princes Trust International. (Photo by Chris Jackson - WPA Pool/Getty Images) ORG XMIT: 775313787 ORIG FILE ID: 1135385743

If you're going to look like royalty, it may as well be for an event celebrating a charity called The Prince's Trust.

Amal Clooney joined husband George Clooney at the event hosted by Prince Charles Tuesday in Buckingham Palace. She also got a group photo with other guests, actors Chiwetel Ejiofor, Luke Evans, Tamsin Egerton, Josh Hartnett and Benedict Cumberbatch.

LONDON, ENGLAND - MARCH 12: (L-R) Chiwetel Ejiofor, Luke Evans, Tamsin Egerton, Josh Hartnett, Benedict Cumberbatch, Amal Clooney and George Clooney attend a dinner to celebrate The Prince's Trust, hosted by Prince Charles, Prince of Wales at Buckingham Palace on March 12, 2019 in London, England. The Prince of Wales, President, The Princes Trust Group hosted a  dinner for donors, supporters and ambassadors of Princes Trust International. (Photo by Chris Jackson - WPA Pool/Getty Images) ORG XMIT: 775313787 ORIG FILE ID: 1135387728
LONDON, ENGLAND - MARCH 12: (L-R) Chiwetel Ejiofor, Luke Evans, Tamsin Egerton, Josh Hartnett, Benedict Cumberbatch, Amal Clooney and George Clooney attend a dinner to celebrate The Prince's Trust, hosted by Prince Charles, Prince of Wales at Buckingham Palace on March 12, 2019 in London, England. The Prince of Wales, President, The Princes Trust Group hosted a dinner for donors, supporters and ambassadors of Princes Trust International. (Photo by Chris Jackson - WPA Pool/Getty Images) ORG XMIT: 775313787 ORIG FILE ID: 1135387728

The human rights attorney was the picture of sheer elegance in a white gown with lovely draping up top, a metallic box-shaped clutch and, wait, is that … no it couldn't be. Yes, but it is: An asymmetrical cape.

LONDON, ENGLAND - MARCH 12: Amal Clooney and George Clooney speak to Prince Charles, Prince of Wales as they attend a dinner to celebrate The Prince's Trust, hosted by Prince Charles, Prince of Wales at Buckingham Palace on March 12, 2019 in London, England. The Prince of Wales, President, The Princes Trust Group hosted a  dinner for donors, supporters and ambassadors of Princes Trust International. (Photo by Chris Jackson - WPA Pool/Getty Images) ORG XMIT: 775313787 ORIG FILE ID: 1135388618
LONDON, ENGLAND - MARCH 12: Amal Clooney and George Clooney speak to Prince Charles, Prince of Wales as they attend a dinner to celebrate The Prince's Trust, hosted by Prince Charles, Prince of Wales at Buckingham Palace on March 12, 2019 in London, England. The Prince of Wales, President, The Princes Trust Group hosted a dinner for donors, supporters and ambassadors of Princes Trust International. (Photo by Chris Jackson - WPA Pool/Getty Images) ORG XMIT: 775313787 ORIG FILE ID: 1135388618

Remember this date, fashionistas. Because March 12 could be the day that the one-armed cape trend began, before thousands of women across the world shook hands with a chic bat wing.

This article originally appeared on USA TODAY: Amal Clooney is the definition of chic at Prince Charles' swanky event