Duchess Kate steps out in lavender for joint appearance with Prince William after maternity leave

Lovely in lavender!

On Tuesday morning, Duchess Kate stepped out alongside Prince William for her first joint public appearance since giving birth to the couple's third child, Prince Louis. The duo attended the Global Ministerial Mental Health Summit -- the first meeting of its kind -- in London. 

The mother-of-three looked beautiful in a long-sleeved, light purple Emilia Wickstead dress. Kate had previously worn the same dress during the royal family's European tour just last year (see all of her looks here).

8 PHOTOS
Duchess Kate and Prince William at Global Ministerial Mental Health Summit
See Gallery
Duchess Kate and Prince William at Global Ministerial Mental Health Summit
LONDON, ENGLAND - OCTOBER 09: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge leave the Global Ministerial Mental Health Summit at London County Hall on October 9, 2018 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images)
Britain's Prince William, Duke of Cambridge (L) and his wife Britain's Catherine, Duchess of Cambridge (2L) attend the first Global Ministerial Mental Health Summit, co-hosted by the UK Government and the OECD, in London on October 9, 2018. - The Mental Health Summit will see political figures, leading academics and policy-makers from around the world come together with one common goal: better mental health for all. The meeting is set to help countries work together to deal with stigma attached to mental health and address other issues to do with mental ill-health. (Photo by Eddie MULHOLLAND / POOL / AFP) (Photo credit should read EDDIE MULHOLLAND/AFP/Getty Images)
LONDON, ENGLAND - OCTOBER 09: Catherine, Duchess of Cambridge attends the Global Ministerial Mental Health Summit at London County Hall on October 9, 2018 in London, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
LONDON, ENGLAND - OCTOBER 09: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Global Ministerial Mental Health Summit at London County Hall on October 9, 2018 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - OCTOBER 09: Prince William Duke of Cambridge and Catherine, Duchess of Cambridge attend the first Global Ministerial Mental Health Summit at London County Hall on October 9, 2018 in London, England. The summit which is being co-hosted by the UK Government and the OECD and will run from the 9th-10th October. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
Britain's Prince William, Duke of Cambridge and his wife Britain's Catherine, Duchess of Cambridge sit on a 'friendship bench', as they attend the first Global Ministerial Mental Health Summit, co-hosted by the UK Government and the OECD, in London on October 9, 2018. - The Mental Health Summit will see political figures, leading academics and policy-makers from around the world come together with one common goal: better mental health for all. The meeting is set to help countries work together to deal with stigma attached to mental health and address other issues to do with mental ill-health. (Photo by Eddie MULHOLLAND / POOL / AFP) (Photo credit should read EDDIE MULHOLLAND/AFP/Getty Images)
LONDON, ENGLAND - OCTOBER 09: Catherine, Duchess of Cambridge attends the Global Ministerial Mental Health Summit at London County Hall on October 9, 2018 in London, England. (Photo by Neil Mockford/GC Images)
LONDON, ENGLAND - OCTOBER 09: Prince William Duke of Cambridge and Catherine, Duchess of Cambridge attend the first Global Ministerial Mental Health Summit at London County Hall on October 9, 2018 in London, England. The summit which is being co-hosted by the UK Government and the OECD and will run from the 9th-10th October. (Photo by Eddie Mulholland - WPA Pool/Getty Images)
HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

She completed her elegant look with a matching earring and necklace set, nude heels, a taupe Mayfair Bag from Aspinal of London and, of course, her signature blow out. William complemented his wife in a black suit and a thin, patterned maroon tie. 

The Duke and Duchess of Cambridge are no strangers to mental health initiatives as they, with Prince Harry, created Heads Together which "combines a campaign to tackle stigma and change the conversation on mental health with fundraising for a series of innovative new mental health services."

Earlier this month, Kate made her return from her six-month-long maternity leave when she visited Sayers Croft Forest School and Wildlife Garden, where she interacted with school children and played with them outdoors. 

The duchess is in the midst of a very busy month as she is expected to attend Princess Eugenie's wedding later this month and her sister, Pippa Middleton, is due to have her first child this fall.

See more of Kate's first appearance postpartum below!

28 PHOTOS
Duchess Kate returns from maternity leave
See Gallery
Duchess Kate returns from maternity leave
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge sits on a log with children during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Peter Nicholls - WPA Pool/Getty Images)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Samir Hussein/Samir Hussein/WireImage)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Samir Hussein/Samir Hussein/WireImage)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge, boot detail, during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Samir Hussein/Samir Hussein/WireImage)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Samir Hussein/Samir Hussein/WireImage)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Samir Hussein/Samir Hussein/WireImage)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Mark Cuthbert/UK Press via Getty Images)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge sits on a log with children during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Peter Nicholls - WPA Pool/Getty Images)
Britain's Catherine, Duchess of Cambridge (R), receives a hug from four-year-old Amwaar, as she says goodbye to school children after visiting to Sayers Croft Forest School and Wildlife Garden in London on October 2, 2018. - Sayers Croft is a residential activity centre based in Surrey, which is owned by Westminster City Council. It aims to involve children and the local community in the environment, providing outdoor facilities for those who may otherwise be unable to access them. (Photo by PETER NICHOLLS / POOL / AFP) (Photo credit should read PETER NICHOLLS/AFP/Getty Images)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 02, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Chris Jackson/Getty Images)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Peter Nicholls - WPA Pool/Getty Images)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Neil Mockford/GC Images)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Neil Mockford/GC Images)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 02, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Chris Jackson/Getty Images)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Neil Mockford/GC Images)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Neil Mockford/GC Images)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Mark Cuthbert/UK Press via Getty Images)
Britain's Catherine, Duchess of Cambridge, sits on a log with school children during her visit to Sayers Croft Forest School and Wildlife Garden in London on October 2, 2018. - Sayers Croft is a residential activity centre based in Surrey, which is owned by Westminster City Council. It aims to involve children and the local community in the environment, providing outdoor facilities for those who may otherwise be unable to access them. (Photo by PETER NICHOLLS / POOL / AFP) (Photo credit should read PETER NICHOLLS/AFP/Getty Images)
Britain's Catherine, Duchess of Cambridge (R), receives a hug from four-year-old Amwaar, as she says goodbye to school children after visiting to Sayers Croft Forest School and Wildlife Garden in London on October 2, 2018. - Sayers Croft is a residential activity centre based in Surrey, which is owned by Westminster City Council. It aims to involve children and the local community in the environment, providing outdoor facilities for those who may otherwise be unable to access them. (Photo by PETER NICHOLLS / POOL / AFP) (Photo credit should read PETER NICHOLLS/AFP/Getty Images)
Britain's Catherine, Duchess of Cambridge, looks for bugs with a pupil from St Augustines School during her visit to Sayers Croft Forest School and Wildlife Garden in London on October 2, 2018. - Sayers Croft is a residential activity centre based in Surrey, which is owned by Westminster City Council. It aims to involve children and the local community in the environment, providing outdoor facilities for those who may otherwise be unable to access them. (Photo by PETER NICHOLLS / POOL / AFP) (Photo credit should read PETER NICHOLLS/AFP/Getty Images)
Britain's Catherine, Duchess of Cambridge, receives flowers as she arrives to visit Sayers Croft Forest School and Wildlife Garden in London on October 2, 2018. - Sayers Croft is a residential activity centre based in Surrey, which is owned by Westminster City Council. It aims to involve children and the local community in the environment, providing outdoor facilities for those who may otherwise be unable to access them. (Photo by PETER NICHOLLS / POOL / AFP) (Photo credit should read PETER NICHOLLS/AFP/Getty Images)
Britain's Catherine, Duchess of Cambridge, talks with school children during her visit to Sayers Croft Forest School and Wildlife Garden in London on October 2, 2018. - Sayers Croft is a residential activity centre based in Surrey, which is owned by Westminster City Council. It aims to involve children and the local community in the environment, providing outdoor facilities for those who may otherwise be unable to access them. (Photo by PETER NICHOLLS / POOL / AFP) (Photo credit should read PETER NICHOLLS/AFP/Getty Images)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge looks for bugs with a pupil from St Augustines School during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Peter Nicholls - WPA Pool/Getty Images)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Peter Nicholls - WPA Pool/Getty Images)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Mark Cuthbert/UK Press via Getty Images)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Peter Nicholls - WPA Pool/Getty Images)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Peter Nicholls - WPA Pool/Getty Images)
LONDON, ENGLAND - OCTOBER 02: Catherine, Duchess of Cambridge during a visit to Sayers Croft Forest School and Wildlife Garden on October 2, 2018 in London, England. Sayers Croft is an activity centre aimed at educating and involving children and the local community in the environment. (Photo by Mark Cuthbert/UK Press via Getty Images)
HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

Read Full Story
JOIN THE CONVERSATION
Like AOL Lifestyle on Facebook