Duchess Kate Middleton dons coat by Princess Diana's favorite designer for St. Patrick's Day

Before you go, we thought you'd like these...
Before you go close icon

Amid reports that Kate Middleton is "less than pleased" with Prince William's ski trip antics, the couple stepped out as expected for the Irish Guards St Patrick's Day Parade in London on Friday.

After missing the event last year, Kate unsurprisingly made her return in green (though she didn't sport the color in 2015) -- and there's special significance in the coat she chose for the occasion. The velvet-trimmed piece is by Catherine Walker, who famously was the late Princess Diana's favorite fashion house. Kate also wore a piece by the same fashion house when she was pregnant with Princess Charlotte at the parade in 2015. This year, the royal mom of two paired the coat with a cocktail-like hat, matching green Gianvito Rossi pumps and an Irish Guard brooch.

See the duchess' St. Patrick's Day outfits over the years:

6 PHOTOS
Kate Middleton's St. Patrick's Day Outfits
See Gallery
Kate Middleton's St. Patrick's Day Outfits

Catherine, Duchess of Cambridge presents the 1st Battalion Irish Guardsmen with shamrocks during the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England.

(Photo by Danny Martindale/WireImage)

Catherine, Duchess of Cambridge, wearing a bespoke Catherine Walker coat, attending the Irish Guards' St. Patrick's Day Parade at Mons Barracks in Aldershot.

(Photo by Zak Hussein/Corbis via Getty Images)

Catherine, Duchess of Cambridge attends the St Patrick's Day parade at Mons Barracks on March 17, 2014 in Aldershot, England.

(Photo by Samir Hussein/WireImage)

Catherine, Duchess of Cambridge attends the St Patrick's Day Parade at Mons Barracks on March 17, 2013 in Aldershot, England.

(Photo by Indigo/Getty Images)

The Duchess Of Cambridge Presents Shamrocks To The Irish Guards At The St Patrick's Day Parade At Mons Barracks In Aldershot.

(Photo by Mark Cuthbert/UK Press via Getty Images)

HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

Following the appearance, William and Kate are set to leave for their short state visit to Paris. Among the many engagements they're expected to squeeze into their two-day visit is a black tie dinner hosted by Her Majesty's Ambassador. We'll keep our eyes peeled for Kate's inevitably stunning gown.

See more photos of Duchess Kate and Prince William at the parade:

26 PHOTOS
Duchess Kate and Prince William honor soldiers on St. Patrick's Day
See Gallery
Duchess Kate and Prince William honor soldiers on St. Patrick's Day
Britain's Catherine, Duchess of Cambridge (C) reacts during her visit to the Irish Guards for a St Patrick's Day parade at Cavalry Barracks in Hounslow, west London on March 17, 2017. / AFP PHOTO / Justin TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge presents the 1st Battalion Irish Guardsmen with shamrocks during the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge presents Domnhall the Band of the Irish Guards Wolfhound Mascot with sprigs of shamrock during the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - MARCH 17: Prince William, Duke Of Cambridge and Catherine, Duchess of Cambridge presents Domnhall the Band of the Irish Guards Wolfhound Mascot with sprigs of shamrock during the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge presents the 1st Battalion Irish Guardsmen with shamrocks during the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge, hair detail, presents the 1st Battalion Irish Guardsmen with shamrocks during the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge and Prince William, Duke Of Cambridge presents the 1st Battalion Irish Guardsmen with shamrocks during the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge presents the 1st Battalion Irish Guardsmen with shamrocks during the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge and Prince William, Duke Of Cambridge presents the 1st Battalion Irish Guardsmen with shamrocks during the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge presents the 1st Battalion Irish Guardsmen with shamrocks during the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge attends the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by UK Press Pool/UK Press via Getty Images)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge and Prince William, Duke Of Cambridge presents the 1st Battalion Irish Guardsmen with shamrocks during the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge attends the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by UK Press Pool/UK Press via Getty Images)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge attends the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by UK Press Pool/UK Press via Getty Images)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge and Prince William, Duke Of Cambridge attend the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by UK Press Pool/UK Press via Getty Images)
Britain's Catherine, Duchess of Cambridge (2R) reacts as she visits the Irish Guards during a St Patrick's Day parade at Cavalry Barracks in Hounslow, west London on March 17, 2017. / AFP PHOTO / Justin TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
Britain's Prince William, Duke of Cambridge, (L) and his wife Britain's Catherine, Duchess of Cambridge visit the Irish Guards during a St Patrick's Day parade at Cavalry Barracks in Hounslow, west London on March 17, 2017. / AFP PHOTO / Justin TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
Britain's Prince William, Duke of Cambridge, (L) and his wife Britain's Catherine, Duchess of Cambridge visit the Irish Guards during a St Patrick's Day parade at Cavalry Barracks in Hounslow, west London on March 17, 2017. / AFP PHOTO / Justin TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
Britain's Prince William, Duke of Cambridge, (L) and his wife Britain's Catherine, Duchess of Cambridge visit the Irish Guards during a St Patrick's Day parade at Cavalry Barracks in Hounslow, west London on March 17, 2017. / AFP PHOTO / Justin TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
LONDON, ENGLAND - MARCH 17: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge attends the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images)
LONDON, ENGLAND - MARCH 17: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the annual Irish Guards St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge presents the 1st Battalion Irish Guardsmen baskets with shamrocks during the annual Irish Guards' St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by Dan Kitwood/Getty Images)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge prepares to present the 1st Battalion Irish Guardsmen with shamrocks during the annual Irish Guards' St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by Dan Kitwood/Getty Images)
LONDON, ENGLAND - MARCH 17: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge arrive to present the 1st Battalion Irish Guardsmen with shamrocks during the annual Irish Guards' St Patrick's Day Parade at Household Cavalry Barracks on March 17, 2017 in London, England. (Photo by Dan Kitwood/Getty Images)
HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

Read Full Story

From Our Partners

Kitten Who Was Supposed To Be Put Down Escapes His Fate - Then Ends Up Here Two Years Kitten Who Was Supposed To Be Put Down Escapes His Fate - Then Ends Up Here Two Years
22 Times Kids Were Brutally, Horribly, Undeniably Honest 22 Times Kids Were Brutally, Horribly, Undeniably Honest
Man Built This Contraption In His Backyard - And Even He Was Surprised How Well It Worked Man Built This Contraption In His Backyard - And Even He Was Surprised How Well It Worked
JOIN THE CONVERSATION
Like AOL Lifestyle on Facebook