Prince William & Kate Middleton Join More Royal Family Members at Commonwealth Day Service

The British Royal Family is stepping out to celebrate Commonwealth Day.

Prince William and Princess Catherine, aka Kate Middleton, attended the Commonwealth Day of Service of Celebration on Monday (March 10) held at Westminster Abbey in London, England.

For the event, William, 42, sported a dark navy suit with a red and blue tie while Kate, 43, donned an all red outfit paired with a pearl necklace.

The Prince and Princess of Wales were joined at the service by King Charles and wife Queen Camilla along with Princess Anne.

If you weren’t aware, Commonwealth Day is an annual celebration of the British Commonwealth of Nations around the world.

Just recently, the Palace responded to a rumor about Kate.

Click through the gallery inside for 25+ pictures of the British Royal Family at the service…