Photo 1 of 27 This black cocktail dress by Christina Stambolian that Lady Di wore in 1994 is her most iconic look, and it helped coin the term “revenge dress” (Photo: Getty Images)
Photo 2 of 27 This is Diana’s most ’90s ensemble—with the suit by Tomasz Starsewski and hat by Philip Somerville—yet all the pieces individually feel utterly timeless (Photo: Getty Images)
Photo 3 of 27 Diana’s black boat neck minidress wouldn’t look out of place today, nor would the styling with pearls and a crossbody bag (Photo: Getty Images)
Photo 4 of 27 As a teenager, Diana was effortlessly chic. The shirt, necktie and pearls are toned down with her woven bag and fuzzy cardigan (Photo: Getty Images)
Photo 5 of 27 Possibly the most modern outfit of them all, here Diana wears a white set with a blazer and cowboy boots while taking her sons to school (Photo: Getty Images)
Photo 6 of 27 In Hong Kong, she wore a red and purple suit set by Catherine Walker to the Governor’s launch in 1989 (Photo: Getty Images)
Photo 7 of 27 Diana might have glimpsed into the future briefly because again, this lime green and purple sheer coverup is all the rage now (Photo: Getty Images)
Photo 8 of 27 The princess wore this fisherman yellow Escada coat with a hat by Philip Somerville at the naming of the patrol boat Vigilant on the Isle of Wight (Photo: Getty Images)
Photo 9 of 27 This is the photo that brought cycling shorts and sweatshirts back, and honestly, it’s not a surprise—neon apricot is so underrated (Photo: Getty Images)
Photo 10 of 27 To contrast her tan, she wore an all-white ensemble to a concert in Italy. The criss cross details on her shoes elevate a simple look into something special (Photo: Getty Images)
Photo 11 of 27 Diana looking very apres ski with this funky knitted jumper in Balmoral (Photo: Getty Images)
Photo 12 of 27 She always considered colour coordination, as telling by this cream, brown and grey look (Photo: Getty Images)
Photo 13 of 27 During her visit to Sydney, she sported a gorgeous blue asymmetrical gown, with a matching clutch and shoes. Again, this neckline is incredibly popular in modern trends (Photo: Getty Images)
Photo 14 of 27 When attending the film premiere of ‘Back to the Future’, she brought attention to her own back with this necklace knotted pearls (Photo: Getty Images)
Photo 15 of 27 Another cool Diana look circulating outfit inspiration boards online, as she sports a blazer and boots again, this time with a sweatshirt, jeans and a cap (Photo: Getty Images)
Photo 16 of 27 Princess Di looked red hot from top to toe while in Paris (Photo: Getty Images)
Photo 17 of 27 Diana wore Catherine Walker again in Dubai, this time in blue and white, and the turban hat was an elegant touch (Photo: Getty Images)
Photo 18 of 27 She looked extra chic whilst shopping on Bond Street in London, sporting the iconic Gucci bamboo handle bag (Photo: Getty Images)
Photo 19 of 27 No-one could pull off this hat as well as she does, and the spotted and striped blouse is a playful touch (Photo: Getty Images)
Photo 20 of 27 Another Catherine Walker number, Diana wore this beaded dress with her famous “revenge” dress necklace (Photo: Tim Graham Photo Library via Getty Images)
Photo 21 of 27 Pretty in pink and white and check, this was a very sweet transition look from summer to autumn (Photo: Getty Images)
Photo 22 of 27 A puffed sleeve blouse and leather wrap around belt was a smart casual option for polo match (Photo: Getty Images)
Photo 23 of 27 This is one of the most memorable photos of Diana, but people only remember that she was napping. They forgot about her pale lavender chiffon dress by Bellville Sassoon, which was so delicate and romantic—an apt choice for this sleeping beauty (Photo: Getty Images)
Photo 24 of 27 On her 36th birthday, the Princess of Wales wore a glittering black gown with a stunning emerald and diamond choker with complementing earrings (Photo: Getty Images)
Photo 25 of 27 This is a quintessential ‘80s look, from the plaid to the padded shoulders and pearls with voluminous hair (Photo: Getty Images)
Photo 26 of 27 Purple really did look gorgeous on Princess Diana, and this matching printed set was ever so elegant (Photo: Getty Images)
Photo 27 of 27 She looked like true royalty at the British Fashion Awards in 1989 in this white pearl dress and bolero by Catherine Walker, complete with a regal high collar (Photo: Getty Images)