Meghan, Duchess of Sussex, wears blue dress at wedding of Princess Diana's niece

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The royal couple attended their first wedding together since their own.

Meghan, Duchess of Sussex, has attended her very first wedding alongside Prince Harry — this time as a guest.

Just four weeks after the pair swapped vows at St. George's Chapel, they stepped out in style for a family ceremony.

The royal couple arrived in Lincolnshire, England, Saturday to witness the union between Harry's cousin Celia McCorquodale — niece of the late Princess Diana — and George Woodhouse.

The prince wore a traditional morning suit with a cream-colored waistcoat and bright blue tie, which coordinated perfectly with the Duchess of Sussex's dress.

As for the newest member of the royal family, she wore a flowing Oscar de La Renta wrap dress in a blue and white pattern and topped off her loose updo with a stark white fascinator.

The duke and duchess held hands as they approached St. Mary's Church for the happy event.

Though it's barely been a month since Harry and his bride celebrated their own nuptials, this is far from Meghan's first outing in her new role.