The Duke and Duchess of Cambridge conducted a minute's silence to pay tribute to the victims of the New Zealand terrorist attack, during a St. Patrick's Day parade.
William, who is the Colonel of the Irish Guards, and Kate were visiting the 1st Battalion at their base in Hounslow, west of London.
The parade started with the last post, before a minute of silence was observed by the royals, the Irish guards and their families who were in memory of the 50 victims.
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The sun shone like Kate, who was wearing a coat and a dark green Alexander McQueen hat from Lock and Co, then handed out clover baskets.
Looking closely it was her husband in his coat of Irish guards in the position of colonel.
After Kate presented the shamrock to the officers and mandates, three cheers were brought to the royal duo before a march in which William took the salute.
On Sunday, around 350 soldiers marched on Parade Square in Cavalry Barracks.
Their families looked with pride covered with warm blankets to protect themselves from the cold March wind.
Leading the procession was the Irish wolfdog and the mascot Domnhall, which Kate tapped and stroked several times while presenting it with a clover.
Drummer David Murray, his regent, stated that the St. Patrick's Day parade was "number one" in his calendar and as a "second birthday".
The mascot, who wore a red coat, was presented with his first shamrock in 2013 and today he led the band and the regiment's parade.
Drummer Murray said: "We had a week of preparation as a battalion, we had a couple of tests, a couple of small parts that we obviously had to tune.
"Domhnall – he's been in the battalion since 2012, he's pretty good at his job … he doesn't really need to hone a lot on what concerns me and he has been a pretty smooth week."
He added: "It helps me get through the parade to be honest, you know what you're doing."