Prince Harry and Meghan Markle went to another wedding together just a few weeks after they tied the knot. 

Another Royal Wedding

The cousin in question is Celia McCorquodale, niece of the late Princess Diana, who is Harry's mother. The royal newlyweds were in attendance to share in her big day with George Woodhouse at St. Andrew and St. Mary's Church in Stoke Rochford, Lincolnshire, on Saturday.

Celia, daughter of Lady Sarah McCorquodale, eldest sister of Diana, wore a classical princess dress with a lace bodice and full-length veil for the wedding, along with the very same Spencer tiara Diana wore when she was tying the knot with Prince Charles back in 1981.

Markle, meanwhile, stepped out in a long-sleeved, loose-fitting blue floral dress from Oscar de la Renta with a white fascinator. According to the Daily Mail, the 36-year-old Suits alum almost fell over in her sky-high heels at one point. Thankfully, Prince Harry was there to keep her steady.

Prince Harry wore a suit and a blue tie, to coordinate with his wife. The two were spotted walking hand-in-hand as they made their way into the church.

A Real Royal Who's Who

The Duke and Duchess of Sussex were also spotted greeting Harry's cousin Louis Spencer, the son of Diana's brother Earl Spencer.

He made quite an impact at the royal wedding once the public caught on to how attractive and single he is. As it happens, his mother, Victoria, was a model prior to getting married in 1989.

Louis' brother, and Diana's niece, Lady Kitty Spencer was also fashionable for Celia's big day in a belted floral print dress with a red veiled fascinator and matching heels.

A couple of Diana's sisters, including the mother of the bride, were part of the wedding party, while Lady Jane Fellows, her brother Charles, 9th Early Spencer, and his wife Karen, were all also in attendance.

Harry and Markle tied the knot at St. George's Chapel in Windsor just a month ago, with Celia and Louis both in attendance alongside famous faces including David and Victoria Beckham, Oprah Winfrey, and Priyanka Chopra.

The bride stunned in a boat-necked dress by British designer Clare Waight Keller that certain commentators, including pop star Katy Perry, felt didn't fit her quite right.

Prince Harry caused a stir online when he was spotted, by the thousands watching the live broadcast, telling Markle how beautiful she looked before biting his lip.

This is the Duchess of Sussex's first public appearance since she met with Queen Elizabeth last Thursday.