50 of Princess Diana's Most Iconic Style Moments

When Princess Diana debuted her ring in the royal couple's engagement photo in 1981, no other color would do. Her rich cobalt suit perfectly complemented that famed sapphire stone — not to mention her blue eyes.

When Diana stepped out for the Serpentine Gallery's annual summer party in 1994, she was determined to wow. She did just that in an off-the-shoulder Christina Stambolian LBD that was so sexy, it became known as "The Revenge Dress."

Not to be outdone the following year, Diana returned to London's Hyde Park for the 1995 Serpentine in a beaded cocktail dress from her go-to designer Catherine Walker.

Princess Diana dressed the part to mingle with Hollywood's elite at the White House in 1995 and turned heads as she twirled with John Travolta in her elegant Victor Edelstein gown.

Princess Diana could always be counted on to dress the part — whether that was a red carpet or a trip to the countryside. For a visit to the Craigowan Lodge on the Balmoral Estate in Scotland, she kept to tradition in a cozy Fair Isle sweater and rugged wellies.

In 1991, the hands-on mom hit the slopes in Austria in a quintessentially '90s ski suit that proved this was one royal who wasn't afraid to get down (and dress down).

For a 1996 trip to Sydney, Australia, Diana was dripping in Chopard diamonds and liquid Versace. The image was so memorable that costume designer Julian Day re-created the look for Naomi Watts's 2013 biopic.

Princess Diana was the picture of royalty when in Hong Kong for a 1989 visit. To complement her tiara, a wedding gift from the queen, she selected a pearl and sequin-encrusted Catherine Walker two-piece, which she dubbed her "Elvis Dress."

Princess Diana looked every inch the movie star when she arrived to the 1985 premiere of James Bond's "A View to a Kill" in a pleated lamé Bruce Oldfield gown.

Matchy-matchy doesn't only apply to the royal family's suits. Diana paired her purple Versace gown with Jimmy Choo accessories at a gala dinner at Chicago's Field Museum of Natural History in 1996.

Returning to coordinated Versace, but this time in her favored casual silhouette, the suit, Diana arrived at the Buenos Aires Airport for a visit to Argentina in 1995.

Another day, another Versace. Princess Diana threw caution to her "Shy Di" persona in a decidedly sultry white slip dress at a 1995 charity concert in Italy.

While in Liverpool in 1995, Diana proved she wasn't shy about color either in a marigold Versace suit.

You guessed it . . . Versace. This time, Princess Diana complemented her blue eyes in an icy style while arriving to London's Royal Brompton Hospital in 1997.

The royal wore a blue silk Bruce Oldfield gown to a 1982 charity fashion show. Of Princess Diana's presence, the British couturier once called her "a very elegant, confident woman who could look down the lens of any camera."

The princess had a Jackie Kennedy moment in Versace's pink suit and a pillbox hat in 1995 while arriving to greet the troops.

While on her honeymoon in Scotland in 1981, Princess Diana dressed the part in a brown tweed suit by Bill Pashley.

Princess Diana was spotted with Queen Elizabeth II in Nigeria while visiting in a demure blue suit in 1989.

Princess Diana echoed the grace of the English National Ballet dancers while taking in a production of "Swan Lake" in 1989 in Catherine Walker's column sheath.

Princess Diana returned for an encore performance of "Swan Lake" in 1997 wearing a sheath from her close friend and frequent collaborator Jacques Azagury.

Another, but entirely different, pink look from Princess Diana came in 1983 when she wore a Victor Edelstein dress and family tiara in Brisbane, Australia.

While in Majorca, Spain, on vacation in 1987, Diana showed the world how resortwear is done in a relaxed belted shirtdress.

No wonder Bruce Oldfield was a go-to designer. This plunging red gown worn in Melbourne, Australia in 1985 proved the designer made Diana look great from every angle.

In 1988, Diana dined at the British Embassy in Paris wearing a red one-shoulder Catherine Walker gown. Not only were the two frequent collaborators, but the designer was also a close friend who was chosen for the princess's burial dress.

While in Abu Dhabi in 1989, Diana dressed the part in a crisp caftan and white trousers.

A rose by any other name . . . Diana arrived to a performance of "Romeo and Juliet" at the Royal Opera House in Covent Garden in 1989 wearing a blue floral gown.

Wearing another casual look, this time a whimsical Smith's Lawn sweater at a polo match in 1983, Princess Diana proved she had elegance no matter what the occasion.

Before becoming a princess, Lady Diana wore a nautical ensemble while posing with Prince Charles and Queen Elizabeth at Buckingham Palace in 1980.

At a Plácido Domingo concert in 1992, she bared her shoulders in a two-toned halter dress.

While still a fiancée to the prince, Diana kept a low profile in pinstripe trousers in 1980.

Princess Diana played the part of mom while walking Princes William and Harry to school at Eton College in 1995.

While in Kuwait City in 1989, Diana teamed a daring color combo with a Catherine Walker suit and a Philip Somerville hat.

Sticking to her print of choice, Princess Diana played with a young Prince William while in New Zealand in 1983.

Sticking to her color of choice, Princess Diana danced the night away in a one-shoulder gown in Melbourne in 1985. Her standout accessory, borrowed from Queen Elizabeth and commissioned by Queen Mary, was an emerald choker worn as a headband.

Princess Diana visited the Royal Military Academy in Sandhurst, England in 1987 in a fittingly embellished Catherine Walker design.

In 1990, Diana toured Japan in a plaid coat dress designed by — you guessed it — Catherine Walker.

While in Versailles in 1994, Princess Diana once again turned to Catherine Walker for a standout number. This black halter gown was accessorized with elegant pearl drop earrings.

In 1987, Princess Diana attended a gala performance by The Royal Ballet at The Berlin Opera House in Catherine Walker's grand ballgown. The pink design was later displayed among other memorable archive pieces at "Diana: Her Fashion Story," an exhibit that was on view at Kensington Palace.

At a 1983 polo match in Cirencester, England, Princess Diana looked polished in black and white separates with full shoulders and a cinched waist.

Princess Diana turned to an old style trick while dining with the Emperor Hirohito in Japan in 1988 in a Yuki gown. She reset diamonds and sapphires from a watch to wear as a headband.