She married Prince Charles on July 29, 1981, in an ivory dress with a 25 foot-long-train made by David and Elizabeth Emanuel.
A trend setter, Diana, rekindled interest in plaids as she wore a Bill Pashley suit while holidaying with her husband at Balmoral in 1981.
She knew how to do florals with panache. She makes an appearance at a Wimbledon match dressed head to toe in florals in 1981.
Stripes, pussy-bow blouse and red skirt and hat, there are too many trends she works in that one look. The Princess wore the outfit on a royal tour of Australia in 1983.
For a dinner reception in New Brunswick, Canada, Diana went dressed in a blue gown with ruffles and accessorised it with a chunky silver belt and matching clutch. Not to be missed here is Spencer family tiara, Diana’s family heirloom that dates back to the Tudor period. She wore this tiara on her wedding day too.
Polka dots were something that she wore at many of her public outings. For a tour of St. Peter’s Basilica in Rome, she chose this pink polka dot dress by Donald Campbell.
No one rocked a gold lame gown like Diana. She wore this glitzy number by Bruce Oldfield to the London premiere of A View to Kill.
Diana's one shoulder gown that she wore to a gala at the National Gallery in Washington, was edgy, fun and oh so glamorous!
In her famous pill box hat on a trip to Canada. Much later both her daughters-in-law Kate and Meghan wore similar hats for their public outings.
Much before women fell prey to the allure of jumpsuits. Diana vacationed in them in 1987 in Spain.
She made a stunning appearance on the red carpet of Cannes Film Festival in 1987 wearing a draped blue chiffon gown.
Acing colour-blocking like a bawse! She wore this pink and red dress and hat in 1989, during her tour of Kuwait.
She looked elegant and glamorous as she appeared for the premiere of the movie Hot Shots in 1991, dressed in a ruched red evening gown.
She knew how to look picture perfect in a red-and-purple skirt set, while she posed in front of the Taj Mahal.
Diana looked gorgeous dressed in a classic black bodycon dress by Christina Stambolian as she attended the Vanity Fair party in 1994. This dress is also famously called Diana's "revenge dress", as the same evening as the party, Prince Charles publicly revealed that he was cheating on her with Camila Parker-Bowles.
She wore a cream power suit to meet Mother Teresa, long before power suits rocked the fashion and political world. All images courtesy Cosmopolitan Uk.