Duchess Kate is repeating one of her best dresses today and we LOVE it

One of her best dresses.

The Duke and Duchess of Cambridge are back making attending royal engagements together after Kate Middleton returned from maternity leave last week. Today, they're at the Global Mental Health Summit in London as they are advocates for mental health, working on the Heads Together campaign since 2016. The global summit is being held in an effort to introduce measures that will improve mental health all over the world.

Ahead of tomorrow’s #WorldMentalHealthDay2018 The Duke and Duchess of Cambridge arrive at the first Global Ministerial Mental Health Summit, which aims to promote better mental health for all. pic.twitter.com/G4HqxuseuU

— Kensington Palace (@KensingtonRoyal) October 9, 2018

Of course, eagle-eyed Kate fans and a number of royal correspondents have spotted that she's wearing a dress she's worn before, one of our favourite looks to be honest.

The Duchess of Cambridge in repeat Emilia Wickstead pic.twitter.com/1yHxfbkVnj

— Rebecca English (@RE_DailyMail) October 9, 2018

The mum of three previously wore the lilac Emilia Wickstead piece while leaving Hamburg Airport as part of last year's Royal Tour of Germany and Berlin.

Is this a recycle of the Wickstead from tour or is that a new shade of lilac? https://t.co/kMe6LnFchc

— HRH Kate Middleton (@princesskate_GB) October 9, 2018

Kate was pictured with her husband and their two children, Princess George and Princess Charlotte before they boarded the flight and the resulting pictures were seriously adorable.