The Metropolitan Museum of Art's annual Costume Institute Gala is one of the season's hottest events where celebrities parade around in fancy gowns and mingle with stars bigger than them.

During Monday night's event in New York City, British model Cara Delevingne, singer Rihanna, fashion designer Stella McCartney and actresses Kate Bosworth and Reese Witherspoon posed together on the red carpet in monochrome and pink ensembles.

They were just a handful of the the stars who strutted their stuff in front of a slew of photographers who snapped away from every angle.

Check out some of the best-dressed celebs of the night...