Kate Middleton and Prince William met with the Prince and Princess of Norway at Windsor Castle

The royals posed for a brand-new portrait together, which was posted on Instagram by the Prince and Princess of Wales.

Princess Catherine wore a vibrant turquoise pantsuit while Prince William wore a navy blue suit with a ruby red necktie.

Princess Mette-Marit wore a bright red dress while Prince Haakon wore a much lighter blue suit and a blue-and-white polka dot tie.

The purpose of the meeting was to discuss shared concerns about the environment.

They all sat down with three leading companies from Norway to brainstorm ideas for possible environmental projects.

Prince William is passionate about environmental issues, as evidenced by his creation of the Earthshot Prize.

The Earthshot Prize aims to award individuals who are taking strides to save the planet and fund their initiatives.

The meeting brought together a lot of royal star-power in one picture.