They don't call Princess Mary the world's most stylish royal [1] for nothing. This woman's always up for a fashion dare, from belting a cropped jumpsuit [2] to pulling off a repeated look [3]. But when she stepped into the Smithsonian's Arts and Industry building for a gala on Wednesday, we still managed to gasp. Her strapless, colorful, and graphic gown was quite the opposite of what's typically thought of as "royal" — save for one spectacular detail.

As Mary made her way into the room, her dress's train trailed behind her, giving off a very regal vibe, especially when she bent down to greet younger guests. It also helped that she kept her accessories simple: the style star skipped a bulky necklace for a gold bangle and drop earrings — aka the ultimate power-woman staple. Scroll through to see her outfit from every angle. Then reflect back on her Vogue Australia shoot [4].

Princess Mary's Printed Gown Seemed a Bit Daring

But the Train Gave It a Very Regal Twist

She Paired the Piece With Drop Earrings, the Ultimate Royal Staple

And While She Skipped a Necklace, She Also Wore a Gold Bangle

Breathtaking!