Royal rewear: Duchess Kate steps out in recycled Emilia Wickstead dress

Kate Middleton and Prince William attended their first joint event together since the birth of Prince Louis

Kate Middleton and Prince William attended their first joint event together since the birth of Prince Louis — Getty

Duchess Kate is wearing an Erdem dress with Jimmy Choo heels and clutch.

Prince William and Kate Middleton stepped out on Tuesday, Oct. 9 for their first joint royal engagement since the birth of their son Prince Louis in April, with the Duke and Duchess of Cambridge attending the inaugural Global Ministerial Mental Health Summit.

The meeting will help countries work together to deal with stigma attached to mental health and address other issues to do with mental ill-health.

In addition to getting to spend some kid-free time together, William and Kate got to further push their mental health initiative.

The Duke and Duchess viewed the work of contemporary fine artist Dario Vargas, who had painted an original piece for the event.

They also heard presentations on two case studies of active mental health programmes from Slovenia and the U.S. and visited an exhibition area. And so did William's jokes.

Fans noticed the Duchess had worn the dress in Hamburg last year
Fans noticed the Duchess had worn the dress in Hamburg last year — Samir Hussein WireImage

The summit is being held at London's County Hall on the South Bank.

The couple also learned about Friendship Bench, part of an innovative programme from Zimbabwe, which has taught elderly women the skills to become trained 'community grandmothers'.

The duchess first showed off the Emilia Wickstead dress on a trip to Germany previous year.

The couple is also preparing for another big event on Friday when William's cousin, Princess Eugenie, celebrates her Royal Wedding to fiance, Jack Brooksbank, at Windsor Castle.

If you or someone you know is in need of support due to mental health issues contact Lifeline on 13 11 14, the Suicide Call Back Service on 1300 659 467 or Kid's Helpline on 1800 55 1800.

Tway clinches first PGA Tour victory in playoff in Napa
Minnesota Children Diagnosed With Rare 'Polio-Like' Illness