The last time we saw the Duchess in the stunning McQueen design was in July 2011 when she and Prince William attended a BAFTA Awards celebration in the US.
Not only was it one of her first red carpet appearances as a royal family member (she married William in April 2011), but it marked one of the first glorious times Kate had absolutely nailed the wardrobe brief. It was the beginning of a style journey, which we've been privy to witnessing in the decade since.
Meanwhile, we must also take a moment to appreciate Prince William's outfit for the Earthshot prize.
With an apt colour palette, the Duke opted for a green velvet suit jacket with a black turtleneck beneath. He added matching green velvet pants.
The evening also included a slew of other A-lists guests who helped to present the prestigious prizes to five winners—Emma Watson, Ed Sheeran and Emma Thompson to name a few.
Launched by Prince William himself in 2020, the awards are also a representation of hope as it celebrates the real and actionable initiatives that are being done, or could be done in the future to protect our planet.
In a statement, William summed it up: "I strongly believe that change is possible, when you put your mind to it. I started thinking about what to do to change the equation to something else: urgency + optimism = action."