Princess Diana Celebrated In A Special Edition Of People Magazine 

At just 19 years old, an English nursery school teacher,

Diana Spencer, stood before a television audience of 750 million, to marry heir-to-the-throne Prince Charles and become Diana, Princess of Wales. Not even two decades passed before the woman who would transform the British monarchy, died at age 36 in a 1997 car accident in Paris.

To mark the anniversary, PEOPLE is celebrating her life with a commemorative edition,

 This all-new 96-page issue is filled with intimate and glorious photos, from the Princess’s countryside childhood, to her joyous days as a young mother to Prince William and Prince Harry, to her final years as a style-setter and international humanitarian who long, she said, to be “Queen of People’s Hearts.”  Also included: The latest on how William, Kate and Harry are carrying on Diana’s good work, picking up causes like land-mine removal and mental health care, which were close to her heart.

“Who’s to know what her extraordinary life would have led to?” asks Diana’s friend Virgin CEO Richard Branson, one of many confidents featured in the People-ABC TV documentary,

This collector’s edition includes a first look at the program’s exclusive interviews, from her wedding gown designer to her beloved younger brother, Charles, 9th Earl Spencer.

“Diana had a genius for people,” says Spencer. “She could make any person, whether they were the grandest or the most humble feel totally at ease in her company.”

Harry Shares His Regret Over Last Phone Call with Mom Diana: \'If I\'d Known ... the Things I Would Have Said to Her\'

2 Friend Reveals the Queen’s Secret ‘Sad Discussion’ About Diana’s Stress During Marriage Woes: ‘She Was So Worried’

3 The Funny, Sweet Reason Prince William Says Diana Would Have Been ‘an Absolute Nightmare’ as a Grandma

4 Prince William Says He Felt Princess Diana’s Presence at His Wedding: I ‘Felt She Was There for Me’

5 WATCH: Prince William Hilariously Recalls Going ‘Bright Red’ at Supermodel Surprise — from His Mom!