Perfectly preened and poised at all moments, the royal family have specific fashion rules they tend to stick to, including longer hems, modest necklines and covered shoulders.
But what's life without a little rebellion? We've seen show-stealing headpieces, thigh-skimming skirts and sky-scraper heels in some unearthed wedding photos. See the rare moments that Princess Beatrice, Princess Anne and more royal ladies pushed the boundaries with their style and chose daring wedding guest outfits…
© WPA Pool
Princess Kate's ivory ensemble
Known the world over as a style icon, the Princess of Wales has rarely ever taken a foot out of line when it comes to her fashion sense. But in a surprise high-profile appearance at Prince Harry and Meghan Markle's wedding in 2018, the former duch*ess chose a rule-breaking colour. Kate stepped out in a cream Alexander McQueen silk coat dress and a Philip Treacy floral hat, colours that were very close to the bridal white guests traditionally avoid.
© Chris Jackson
Princess Beatrice's hat
Who can forget one of Princess Beatrice's most memorable style moments? Sarah Ferguson sparked controversy when she stepped out in an oversized Philip Treacy fascinator – which some compared to a pretzel – during the royal wedding of Prince William and Princess Kate Middleton at Westminster Abbey in April 2011.
© Getty
Princess Beatrice's killer heels
Back in 2013,the late Queen's granddaughter attended Jake Warren and Zoe Stewart's nuptials at the Wren Chapel in London wearing a blue coat with a mustard fascinator. But nobody could tear their eyes away from her very unroyal footwear – towering black patent heels.
You may also like
© Getty
Princess Beatrice's trainers
Princess Beatrice wore three stunning ensembles to her cousin Prince William's nuptials. For the private wedding reception at the Goring Hotel, hosted by Carol and Michael Middleton, Beatrice prioritised comfort with her white trainers peppered with colourful fruit prints, offset by her glamorous maroon gown finished with silver embellishments.
© Getty
Zara Tindall's knee-high boots
King Charles and Queen Camilla's 2005 was unconventional in many ways, and Zara Tindall embraced that with her psychedelic-print shirt dress and knee-high boots. Adding to her 60s-inspired ensemble, the royal added a black fedora and dangling pendant earrings.
© Getty
Zara Tindall's pin-stripe mini skirt
Aged just 17, Princess Anne's daughter made a style statement at Santa Palmer-Tomkinson and Simon Sebag-Montefiore's big day at The Liberal Jewish Synagogue in St John's Wood.
She was spotted exiting a car in a dark ebony pinstripe mini skirt and matching blazer. Square-toed black mules and a black boater hat added the finishing touches to her modern work-chic ensemble.
© Max Mumby/Indigo
Princess Anne's bridal white frock
The Princess Royal channelled 60s style at Lady Rose Windsor andGeorge Gilman's nuptials in 2008. Anne chose an ivory summer frock with a wrapover bodice, a ruffle trim and subtle jacquard polka dots interspersed with a feminine orange floral print.
While her pearl necklace and lemon-coloured floral headpiece tied in with her chosen colourway, she added a pop of colour with her bright red lipstick.
© Brooks Kraft
Princess Anne's colour-clash moment
Never one to shy away from colour, Princess Anne chose a colour-clashing ensemble for thePrince and Princess of Wales' wedding. A green floral coat was layered over the top of a purple dress in her show-stealing outfit.
© Max Mumby/Indigo
Princess Eugenie's pearlescent mini dress
BronzedPrincess Eugenie showed off her golden tan in a pearlescent dress at Chloe Delevingne andLouis Buckworth's wedding in September 2007. Pictured alongside her sister Princess Beatrice and mother Sarah Ferguson, 17-year-old Eugenie was all smiles in an ivory mini dress with a textured bandeau top and a shimmering skirt, which she teamed with a matching cream jacket with a pie-crust collar and brown embellished heels.
© Getty
duch*ess Sophie's statement feathers
The duch*ess of Edinburgh has undergone a significant style evolution over the years. Back in 1994, Sophie joinedPrince Edward, at his former flame Anastasia Cooke's wedding. A far cry from her usual tailored suits and floral dresses, she fonned an unexpected high-shine metallic cropped jacket with a mosaic print and Queen Anne neckline alongside a simple black skirt.
She went for a 'more is more' approach to her accessories, choosing fur-trim black gloves and a large saucer-shaped hat covered with feathers.
© Princess Diana Archive
Princess Diana's stripes
Princess Diana rocked statement stripes as she attended the Sarah Brennan and Hugh Lyndsay's wedding. Designed by Roland Klein, Diana's outfit consisted of a horizontal striped navy and white skirt with a vertical striped oversized blazer, a white top and V-neck heels.
PHOTOS:Rule-breaking celebs who wore white wedding guest dresses: From Victoria Beckham to the late Queen
SHOP:21 wedding guest outfit ideas: From beautiful dresses to chic jumpsuits
