Honoring those lost.

Kate Middleton and Prince William made a special trip to the U.S. Embassy in London on Tuesday to sign a book of condolences for the 49 victims of the Orlando, Florida, shooting from over the weekend.

The Duke and Duchess of Cambridge signed their special messages in front of a commemorative flag presented to the former Secretary of State Hillary Clinton by the LGBT organization Kaleidoscope Trust.

Prince William’s father, Prince Charles, and his wife, Camilla, also signed the book, and the Clarence House Twitter account posted their message online.

“Our hearts go out to all of those who have lost loved ones and to those who have been injured in this unspeakably barbaric act. You are in our special prayers,” the royals wrote to the victims’ families.

After they signed, William and Kate spoke with representatives from the embassy’s LGBT network GLIFAA.


Following the news of the mass casualties from Orlando, Queen Elizabeth, who is currently in the middle of her 90th birthday celebrations released a statement. “Prince Philip and I have been shocked by the events in Orlando,” the Royal Family’s Twitter account posted. “Our thoughts and prayers are with those who have been affected.”

WINDSOR, ENGLAND - JUNE 13: Catherine, Duchess of Cambridge chats with guests after the Order of the Garter Service at Windsor Castle on June 13, 2016 in Windsor, England. Today the traditional Garter parade was cancelled in favour of dignitaries arriving in cars due to the inclement weather. (Photo by Chris Jackson/Getty Images)

Photo: Getty Images

WATCH: Kate Middleton Stuns in a Color-Block Dress for Queen Elizabeth’s Outdoor Birthday Party

Over the last few days, the royals have attended Elizabeth’s Trooping the Colour ceremony on Saturday and an outdoor birthday party on Sunday. The next day they attended the Order of the Garter Service at Windsor Castle, which honors knights. Kate stood out at the event in a cherry red dress, coat, and hat after sporting a cream getup for the Trooping the Colour. Sadly her two adorable children, George and Charlotte, were not in attendance at Monday’s festivities despite making a precious cameo over the weekend.  //platform.twitter.com/widgets.js