Here's the one thing that could go wrong on Princess Eugenie's wedding day

By Jessica Pollack

Royal watchers have another fairytale wedding in store as Princess Eugenie and Jack Brooksbank prepare to say "I do" on Oct. 12 and St George's Chapel, but there's one thing that could sadly rain on their parade: Storm Callum. The UK has been enjoying a bout of beautiful weather in the walkup to the Queen's granddaughter's big day, but it's predicted to turn to strong winds and rain come Friday.

RELATED: Everything we know about Princess Eugenie and Jack's royal wedding

Wedding planners are surely preparing contingency plans for stormy weather, which will hopefully hold off until the princess arrives at the Windsor Castle chapel. In addition to ensuring alternative locations for any parts of the luncheon, reception or other festivities that were outdoors, the couple will likely opt for a covered carriage for their short ride through Windsor following the ceremony.

The Scottish State Coach is a beautiful option if it rains. Photo: © Victoria Jones - WPA Pool/Getty Images

Prince Harry and Meghan rode in the open Ascot Landau Carriage back in May, but their backup was the Scottish State Coach, a beautiful option for Princess Eugenie and Jack that was most recently used for the Queen's 90th birthday celebrations in 2016. With its unique glass windows on the roof and around the sides, fans will be able to see the blushing royal bride from every vantage point.

RELATED: Who is Jack Brooksbank? Details about the groom and his family

But the 28-year-old is surely taking it all in stride. "I'm not stressed at all," Eugenie told British Vogue in a rare interview with her sister and maid of honour, Princess Beatrice. "It's nerve-wracking because you want it to be perfect but then you realise that you're going to be with the person you love forever and nothing else really matters."

All that Princess Eugenie cares about is that she's marrying the man she loves. Photo: © Instagram/@theroyalfamily

Final details about the couple's nuptials were revealed this week and it's shaping up to be one for the books, from the red-velvet cake prepared by designer Sophie Cabot to the two songs Andrea Bocelli will sing during the ceremony accompanied by the Royal Philharmonic Orchestra (RPO). The bridal party is also filled with royal cuties like Prince George, Princess Charlotte, Isla and Savannah Phillips and Mia Tindall, not to mention singer Robbie Williams' daughter Teddy. The countdown is on!

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