The exhibition features more than 800,000 ceramic poppies which pour out of the tower and into the dry moat.
Both Wills and Harry wore navy suits and ties, while Kate re-styled her royal blue shift dress by Stella McCartney (the same design she wore to the Commonwealth Games) complete with a navy envelope clutch.
After appearing to wipe away a tear, the Duchess was all smiles as she talked to a Yeoman Warder. The exhibition has already had a huge amount of attention but the royal trio touring the site (knee-deep in poppies) will definitely attract more visitors.
LOVE THE ROYALS? Take a look through this gallery to see more from Kate and Wills aka your favourite royal couple.
MORE! Catch up on all the latest on Kate Middleton and Prince William right here.
More:Have You Seen?
Suggested For You
Get top stories and blog posts emailed to me each day. Newsletters may offer personalized content or advertisements. Learn more