Widely regarded as the hardest working member of the British royal family, Princess Anne has enjoyed a long running and colourful career as the only daughter of Her Majesty Queen Elizabeth II and Prince Philip, Duke of Edinburgh.
WATCH Princess Anne reveal why she REFUSES to shake hands with the public:
The famously feisty Princess Royal has been married twice, first to Captain Mark Phillips - with whom she shares son Peter and daughter Zara - and now to Timothy Laurence.
But it seems Anne, Princess Royal has been harbouring a secret passion for someone (or rather, something) entirely different: sunglasses!
So frequently has the avid equestrian enthusiast been photographed attending royal engagements in her signature accessory, that Town and Country Magazine declared "no one wears shades quite like the Princess Royal".
The mother-of-two has lifted her sedate style with futuristic eyewear for the Queen's garden party at Buckingham Palace, the Chelsea Flower Show and a variety of horse trials.
Her favourite style appears to be a frameless, sporty pair of sunnies from Adidas, which have been copied on the runway by Stella McCartney and Rihanna's Fenty x Puma, Vogue reports.
Catch all of Princess Anne's best sunglasses below!
Princess Anne attends the launch of Venovus Cancer Charity in Cardiff, Wales in October 2018 wearing Matrix-inspired Adidas shades.
Princess Anne watches the Whatley Manor International Horse Trials in 2015 in a pair of dark brown polarised lenses.
It looks like Princess Anne has passed on her love of sunglasses to her granddaughter Mia Tindall, Zara's daughter with former rugby pro Mike Tindall!
Princess Anne is seen the day after the royal wedding of her nephew Prince Harry and Meghan Markle at St George's Chapel in Windsor in her favourite pair of Adidas aerodynamic sunnies with red, polarised lenses.
The famously frugal royal is known for recycling her designer outfits, and it seems she loves to rewear these sunglasses as often as possible!
The Princess Royal attends the Whatley Manor Horse Trials in September, 2018 in her signature slimline shades.
Princess Anne gets her husband Timothy in on the sunglasses act at the Royal London Yacht Club Champagne Party in August, 2018.
Princess Anne dons her beloved $199 AUD Adidas sports shades at the Royal Windsor Horse Show in May, 2019.
Princess Anne looks a little bored as she hides behind dark lenses watching the Braemar Highland Games with the Queen and Prince Charles in 2010.
Like mother like daughter!
The Princess Royal goes sans shades for a day of horse racing at Cheltenham Festival in England, but Zara Tindall takes over in a pair of tortoise shell frames.
The Princess Royal shares a laugh (from behind her sunnies) with her brother Prince Edward, Earl of Wessex, nephew Prince William and his wife Kate Middleton, Duchess of Cambridge at Royal Ascot in 2017.
Princess Anne wears her Adidas 'speed dealer shades', so called by Harper's Bazaar, to the Great Yorkshire Show in July, 2018.