Meghan Markle and Prince Harry's most public appearance during the Queen's Platinum Jubilee visit to the United Kingdom has arrived.

The Duke and Duchess of Sussex headed out in London this morning with other members of the royal family to attend the national Service of Thanksgiving for the Queen at St. Paul's Cathedral.

Meghan embraced her royal flair by donning an all-white Dior Haute Couture ensemble, which included a belted coat dress and a beautiful white hat by Dior's Stephen Jones. S

She wore her hair in a bun and applied makeup that included a smokey eye and nude lipstick.

The couple's children, Archie, three, and Lilibet, who is almost one year old, did not accompany them.

Meghan Markle and Prince Harry both attended Trooping the Colour yesterday.

Due to their status as non-working royal family members, the pair did not take part in the carriage parade or balcony flypast viewing.

. In 2020, Harry and Meghan will stand down from their senior royal family positions.