The Duke and Duchess of Cambridge visited the U.S. Embassy in London to pay their respects to the victims gunned down in a Florida nightclub.
The couple signed their names in a book of condolences that honored the 49 people shot dead and the dozens of others wounded at Pulse, a gay nightclub in Orlando. The early Sunday morning attack is the deadliest mass shooting in American history.
"With our deepest condolences and with our thoughts and prayers to all those affected,” wrote Prince William. His wife then added her name, Catherine, next to his.
The duke and duchess also met with U.S. Ambassador Matthew Barzun and embassy staff during their visit.
More The Royals videos
‘Diana, Our Mother’ filmmakers: William and Harry are ‘courageous’
Princes William and Harry recall ‘Diana, Our Mother’ in new documentary
William and Kate arrive in Germany with Prince George, Princess Charlotte
Duchess Kate to Prince William: ‘We’ll just have to have more babies’
Last month, the duke's brother, Prince Harry, spent about two weeks in Orlando. The city served as the host for the 2016 Invictus Games, the Paralympic-style sporting event Harry launched for wounded servicemen.
Prince Harry has spoken of fond memories he has of visiting Orlando, particularly from a trip he and his brother took to Disney World in 1993 with their mother, the late Princess Diana.