10 Hidden Details You Didn't Know About Princess Diana's Wedding Dress

The exact moment Lady Diana Spencer stepped out of royal residence Clarence House on July 29, 1981, reporters everywhere ripped open sealed envelopes revealing the "most closely guarded secret in fashion history." The design and details of the future princess's wedding dress managed to remain a complete mystery until hours before the ceremony, and the dramatic unveiling did not disappoint.

Created by husband-and-wife design team David and Elizabeth Emanuel, the intricate ivory taffeta gown later sparked copycats around the world, but with elaborate embroidery, 10,000 pearls and a 25-foot-long train, no one's ever come close to replicating the stunning bridal look.

Today, on the 20th anniversary of her passing, we remember one of Princess Diana's most iconic moments and the dress at the heart of it.