Kate Middleton and Prince William Couldn't Stop Giggling at the Global Mental Health Summit

They're the cutest.

The Duke  & Duchess Of Cambridge Attend The Global Ministerial Mental Health Summit
Getty ImagesWPA Pool

On Tuesday in London, . Mental health initiatives are close to both of the royals' hearts, and today marks their first joint engagement together since Kate gave birth to Prince Louis in April.

Kate recycled a gorgeous lilac Emilia Wickstead dress (you can shop it )—the same one she was spotted in last year while holding hands with Princess Charlotte (and caring for her when she fell) as she, Prince George, and William boarded a helicopter.

Advertisement - Continue Reading Below

Both Kate and Wills are clearly very excited to be back at work together. The royal couple couldn't stop laughing and smiling throughout the day, though they kept the physical PDA to a minimum. Royal reporter Rebecca English captured the adorable moment the Duke and Duchess were told to "act natural" for the cameras, and they just couldn't hold it together.

The Duke And Duchess Of Cambridge Visit Germany - Day 3
Getty ImagesPool/Samir Hussein

Here's the video:

William and Kate got a serious fit of the giggles today when they were asked to pose on a bench and ‘act naturally’ at the Global Ministerial Menta Heath Summit stand

— Rebecca English (@RE_DailyMail)

Then the moment was documented in a perfect series of photos:

The Duke  & Duchess Of Cambridge Attend The Global Ministerial Mental Health Summit
Getty ImagesWPA Pool
The Duke  & Duchess Of Cambridge Attend The Global Ministerial Mental Health Summit
Getty ImagesWPA Pool
Advertisement - Continue Reading Below
The Duke  & Duchess Of Cambridge Attend The Global Ministerial Mental Health Summit
Getty ImagesWPA Pool

Will also immediately told artist Dario Vargas that Kate is "the arty one," which lightened up the mood. The Duke and Duchess of Cambridge clearly look very relaxed and at ease.

The Duke  & Duchess Of Cambridge Attend The Global Ministerial Mental Health Summit
Getty ImagesWPA Pool
The Duke  & Duchess Of Cambridge Attend The Global Ministerial Mental Health Summit
Getty ImagesWPA Pool

During the summit, the Duke and Duchess went to a workshop about a U.S. initiative that would provide mental health outreach for mothers. This feels incredibly fitting for Kate, who just returned from six months of maternity leave.

Advertisement - Continue Reading Below