She's been spending the last few months out of the limelight following the birth of her third child Prince Louis, but Catherine has now stolen the show on her first joint royal engagement with her husband Prince William following her maternity leave - and she couldn't look happier.
Tuesday's summit focused on political figures, leading academics and policy-makers from around the world coming together with the common goal of better mental health for all.
They also heard presentations on two case studies of active mental health programmes from Slovenia and the U.S. and visited an exhibition area. Vargas said he hoped to have other attendees also contribute to the painting to symbolize how everyone can lend a helping hand in tackling mental health issues. The initiative was started by Dixon Chibanda and teaches the women to become lay health workers.
Vargas handed over a brush to Kate and William, though both were a bit hesitant to partake.
The Duke and Duchess also visited the exhibition area and met with representatives from a number of organisations to hear more about their mental health campaigns, and met with young people who have had or are dealing with mental health issues.
Her husband was only delighted to make a joke and said that his wife's handiwork had nearly "ruined the picture" but as you'll see from snaps and videos of the event, she saw the amusing side of his remark.
The royal donned a chic lilac Emilia Wickstead dress, which she teamed with a pair of pointed nude stilettos and a matching handbag.
IPCC calls for far-reaching changes to fight global warming
They will also require considerable political engagement globally, as will reducing the amount of carbon being emitted. Clearly, that deceivingly small half-degree difference has the potential to bring about significantly worse effects.
Educating the youth on mental health is critical
According to the Guardian op-ed, despite some improvements in communities around the world, there's still a long way to go. Athletes and staff will have access to a mental health screening programme when they join and leave the elite set-up.