The royal trio headed to London’s County Hall in Southbank to host the event under their Heads Together campaign, an initiative that they launched earlier this year that aims to support children and teens battling mental health issues.
They spoke at a reception at County Hall, where guests took selfies in a photo booth using a hashtag #Thereforme. The duchess wore a pink pussy bow Kate Spade chiffon dress with a floral print.
All three took in a ride at the London Eye in Westminster and met with children who received psychological support. Later on Monday, the London Eye will be lit in purple to mark the day.
This is the first official outing for the duchess in what promises to be a busy week. On Tuesday, she will make a one-day visit to the Netherlands, where she will mingle with members of the Dutch royal family. She will take in an exhibition in The Hague and will also visit Rotterdam to see Bouwkeet, a new community social project.
Earlier this month, the duke and duchess returned from their official tour to Canada with Prince George and Princess Charlotte.
The family toured Vancouver, Victoria, Bella Bella, Haida Gwaii and Kelowna in British Columbia and Whitehorse and Carcross in Yukon. The duke and duchess visited the country before, in 2011.
Mental health issues, and especially their impact on children, are a top priority for the three young royals.
Earlier this year, the duke and duchess took part in a series of royal engagements aimed at promoting the well-being of teenagers and children: The duchess promoted the launch of a series of podcasts dealing with children’s mental health. Called the Child in Mind series, it featured 20-minute segments hosted by BBC Radio 4 presenter Claudia Hammond.
The young royals also took a tour of Youthscape, a charity in Bute Mills where they visited the recently refurbished center for teens and children. They met with staffers from CHUMS, a mental health service that aids young people. They also met with various charities working on mental health matters including Our Minds Matter, OM, Luton Council of Faiths and Grassroots.