Meghan Markle wore blue floral Oscar de la Renta dress to Princess Diana's niece's wedding

Meghan Markle accompanied Prince Harry to Celia McCorquodale and George Woodhouse's wedding and stole the show with an Oscar de la Renta dress.

The 36-year-old looked absolutely stunning in the white and blue ensemble as she walked up to St. Andrew and St. Mary's Church in Stoke Rochford, Lincolnshire on Saturday, June 16, 2018.

The long sleeved cocktail dress, which can be bought online at Moda Operandi's website for around $5 000, was paired up with a white mirrored clutch and pointed-toe stilettos.

Those same stilletos proved to be an obstacle to the Duchess of Sussex. As she was walking through the graveyard towards the church, one of her heels sunk into the grass, nearly causing her to tumble

Luckily, Prince Harry, who was walking alongside her, had a firm grip on Markle's hand and help her regain her balance and composure before continuing down the steep path.

The ceremony was attended by several members of the Spencer family, considering that Celia is the daughter of Lady Sarah McCorquodale, Princess Diana's elder sister.

Celia appeared at the church in a Rolls Royce Silver Ghost from 1910. Aside from the beautiful wedding that she wore, the tiara on her head caught everyone's attention due to being part of history.

It was the same tiara worn by Princess Diana on her wedding day in 1981. The silver piece was adorned with stars and tulips, with a big big heart as the centerpiece, and was decorated with small diamonds all around.

Unlike Markle, whose father, Thomas Markle, didn't walk her down the aisle due to severe health issues, Celia was accompanied by her father, Neil McCorquodale.

Earl Spencer and Lady Jane Fellowes, Diana's brother and sister, as well as Lady Kitty Spencer, who currently works for Dolce & Gabbana as a model, were among the wedding guests.

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