Duchess Kate stuns in red off-the-shoulder Alexander McQueen dress

Another day of the royal tour, another show-stopping dress for Duchess Kate.

On the third day of their official tour of Poland and Germany, William and Kate stepped out for yet another garden party in celebration of the queen's birthday, and the fashionable mom of two did not hold back. Monday's dress may have been daring (and a little bit plunging), but Wednesday's look turned heads for a totally different reason.

It's not the first time we've seen the Duchess of Cambridge in this season's most popular trend -- off-the-shoulder -- but it's definitely one of the trendiest looks she's worn. Especially for a more formal engagement, the evening's shirred, crinkle chiffon look was a bit less polished than what she typically wears, though not necessarily in a bad way.

With her new shorter locks curled to perfection, she looked lovely.

28 PHOTOS
Duchess Kate in red Alexander McQueen dress
See Gallery
Duchess Kate in red Alexander McQueen dress
BERLIN, GERMANY - JULY 19: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend The Queen's Birthday Party at the British Ambassadorial Residence during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by Chris Jackson - Pool/Getty Images)
Britain's Prince William and his wife Catherine, Duchess of Cambridge applaud at the 'Queen's Birthday Garten Party' in British ambassador's residence in Berlin, Germany, July 19, 2017. REUTERS/Jens Kalaene/Pool
BERLIN, GERMANY - JULY 19: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend The Queen's Birthday Party at the British Ambassadorial Residence during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by Chris Jackson - Pool/Getty Images)
Britain's Prince William, Duke of Cambridge, his wife Kate, the Duchess of Cambridge attend the Queen's Birthday Garden Party at the Ambassador's Residence in Berlin on July 19, 2017. The British royal couple is on a three-day visit in Germany.  (Photo credit should read JENS KALAENE/AFP/Getty Images)
BERLIN, GERMANY - JULY 19: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend The Queen's Birthday Party at the British Ambassadorial Residence on the first day of their visit to Germany on July 19, 2017 in Berlin, Germany. The royal couple are on a three-day trip to Germany that includes visits to Berlin, Hamburg and Heidelberg. (Photo by Matthias Nareyek - Pool/Getty Images)
BERLIN, GERMANY - JULY 19: Catherine, Duchess of Cambridge attenda The Queen's Birthday Party at the British Ambassadorial Residence on the first day of their visit to Germany on July 19, 2017 in Berlin, Germany. The royal couple are on a three-day trip to Germany that includes visits to Berlin, Hamburg and Heidelberg. (Photo by Matthias Nareyek - Pool/Getty Images)
Kate, the Duchess of Cambridge talks to guests at the Queen's Birthday Garden Party at the Ambassador's Residence in Berlin on July 19, 2017. The British royal couple is on a three-day visit in Germany. / AFP PHOTO / dpa / Matthias Nareyek / Germany OUT (Photo credit should read MATTHIAS NAREYEK/AFP/Getty Images)
BERLIN, GERMANY - JULY 19: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend The Queen's Birthday Party at the British Ambassadorial Residence during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by Chris Jackson - Pool/Getty Images)
BERLIN, GERMANY - JULY 19: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend The Queen's Birthday Party at the British Ambassadorial Residence on the first day of their visit to Germany on July 19, 2017 in Berlin, Germany. The royal couple are on a three-day trip to Germany that includes visits to Berlin, Hamburg and Heidelberg. (Photo by Matthias Nareyek - Pool/Getty Images)
Kate, the Duchess of Cambridge talks to guests at the Queen's Birthday Garden Party at the Ambassador's Residence in Berlin on July 19, 2017. The British royal couple is on a three-day visit in Germany. / AFP PHOTO / dpa / Matthias Nareyek / Germany OUT (Photo credit should read MATTHIAS NAREYEK/AFP/Getty Images)
Britain's Prince William, Duke of Cambridge, his wife Kate, the Duchess of Cambridge attend the Queen's Birthday Garden Party at the Ambassador's Residence in Berlin on July 19, 2017. The British royal couple is on a three-day visit in Germany. / AFP PHOTO / POOL / Jens Kalaene (Photo credit should read JENS KALAENE/AFP/Getty Images)
Britain's Prince William, Duke of Cambridge and his wife Kate, the Duchess of Cambridge speak with General Secretary of DFB Friedrich Curtius (L) during the Queen's Birthday Garden Party at the Ambassador's Residence in Berlin on July 19, 2017. The British royal couple is on a three-day visit in Germany. / AFP PHOTO / POOL / Jens Kalaene (Photo credit should read JENS KALAENE/AFP/Getty Images)
BERLIN, GERMANY - JULY 19: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend The Queen's Birthday Party at the British Ambassadorial Residence during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by Chris Jackson - Pool/Getty Images)
BERLIN, GERMANY - JULY 19: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend The Queen's Birthday Party at the British Ambassadorial Residence during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by Chris Jackson - Pool/Getty Images)
BERLIN, GERMANY - JULY 19: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend The Queen's Birthday Party at the British Ambassadorial Residence during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by Chris Jackson - Pool/Getty Images)
BERLIN, GERMANY - JULY 19: Catherine, Duchess of Cambridge attenda The Queen's Birthday Party at the British Ambassadorial Residence on the first day of their visit to Germany on July 19, 2017 in Berlin, Germany. The royal couple are on a three-day trip to Germany that includes visits to Berlin, Hamburg and Heidelberg. (Photo by Matthias Nareyek - Pool/Getty Images)
BERLIN, GERMANY - JULY 19: Catherine, Duchess of Cambridge attenda The Queen's Birthday Party at the British Ambassadorial Residence on the first day of their visit to Germany on July 19, 2017 in Berlin, Germany. The royal couple are on a three-day trip to Germany that includes visits to Berlin, Hamburg and Heidelberg. (Photo by Matthias Nareyek - Pool/Getty Images)
BERLIN, GERMANY - JULY 19: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend The Queen's Birthday Party at the British Ambassadorial Residence during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by Chris Jackson - Pool/Getty Images)
British Ambassador to Germany Sebastian Wood (R) delivers a speech next to Britain's Prince William, Duke of Cambridge, his wife Kate, the Duchess of Cambridge during the Queen's Birthday Garden Party at the Ambassador's Residence in Berlin on July 19, 2017. The British royal couple is on a three-day visit in Germany. / AFP PHOTO / POOL / Jens Kalaene (Photo credit should read JENS KALAENE/AFP/Getty Images)
Kate, the Duchess of Cambridge talks to guests at the Queen's Birthday Garden Party at the Ambassador's Residence in Berlin on July 19, 2017. The British royal couple is on a three-day visit in Germany. / AFP PHOTO / dpa / Matthias Nareyek / Germany OUT (Photo credit should read MATTHIAS NAREYEK/AFP/Getty Images)
BERLIN, GERMANY - JULY 19: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend The Queen's Birthday Party at the British Ambassadorial Residence during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by Chris Jackson - Pool/Getty Images)
Britain's Prince William and Catherine, Duchess of Cambridge speak with German Football Association (DFB) secretary general Friedrich Curtius (L) at the 'Queen's Birthday Garten Party' in British ambassador's residence in Berlin, Germany, July 19, 2017. REUTERS/Jens Kalaene/Pool
Britain's Prince William makes a speech as his wife Catherine, Duchess of Cambridge listens at the 'Queen's Birthday Garten Party' in British ambassador's residence in Berlin, Germany, July 19, 2017. REUTERS/Jens Kalaene/Pool
Britain's Prince William, Duke of Cambridge, his wife Kate, the Duchess of Cambridge attend the Queen's Birthday Garden Party at the Ambassador's Residence in Berlin on July 19, 2017. The British royal couple is on a three-day visit in Germany. / AFP PHOTO / dpa / Jens Kalaene / Germany OUT (Photo credit should read JENS KALAENE/AFP/Getty Images)
Britain's Prince William, Duke of Cambridge, his wife Kate, the Duchess of Cambridge attend the Queen's Birthday Garden Party at the Ambassador's Residence in Berlin on July 19, 2017. The British royal couple is on a three-day visit in Germany. / AFP PHOTO / dpa / Jens Kalaene / Germany OUT (Photo credit should read JENS KALAENE/AFP/Getty Images)
Britain's Prince William, Duke of Cambridge, his wife Kate, the Duchess of Cambridge attend the Queen's Birthday Garden Party at the Ambassador's Residence in Berlin on July 19, 2017. The British royal couple is on a three-day visit in Germany. / AFP PHOTO / dpa / Jens Kalaene / Germany OUT (Photo credit should read JENS KALAENE/AFP/Getty Images)
BERLIN, GERMANY - JULY 19: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend The Queen's Birthday Party at the British Ambassadorial Residence on the first day of their visit to Germany on July 19, 2017 in Berlin, Germany. The royal couple are on a three-day trip to Germany that includes visits to Berlin, Hamburg and Heidelberg. (Photo by Matthias Nareyek - Pool/Getty Images)
HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

Prince William made a speech and then the royal duo sipped some bubbly (after toasting Her Majesty, of course!) and then chatted with guests at the party.

Kate's ruffled red number may be a fashion departure for our favorite duchess, but it comes from a familiar (and favorite) brand: Alexander McQueen. It's Kate's second McQueen look since starting this tour, and just one of countless she's worn so far this year. We've seen the label on every tour she's gone on (from Australia to Canada, India and beyond) and it's further proof that the brand is her go-to -- even while abroad.

If Kate's shoes look a bit familiar to you, that's because she just wore them last week. The gorgeous Prada Scalloped Suede Sandalhas to be comfortable, as Kate bought them in both plum and nude! She kept her accessories minimal otherwise, simply choosing a very cool pair of Simone Rocha drop earrings.

The Duke and Duchess of Cambridge arrived in style this morning with mini-me's George and Charlotte in tow, perfectly coordinating their royal blues. So it only makes sense, really, that Kate would swap to vibrant red to celebrate the queen.

Click through above to see more photos from the evening's festivities, and below -- see the picture-perfect family of four arriving in Berlin!

13 PHOTOS
Prince William, Kate Middleton, George & Charlotte in Berlin
See Gallery
Prince William, Kate Middleton, George & Charlotte in Berlin
Britain's Prince William, Duke of Cambridge (L) and his son Prince George arrive at the airport in Berlin on July 19, 2017. The British royal couple is on a three-day visit in Germany. / AFP PHOTO / POOL / Kay Nietfeld (Photo credit should read KAY NIETFELD/AFP/Getty Images)
Britain's Prince William, Duke of Cambridge, his wife Kate, the Duchess of Cambridge and their children Prince George and Princess Charlotte arrive at the airport in Berlin on July 19, 2017. The British royal couple is on a three-day-visit in Germany. / AFP PHOTO / POOL / STEFFI LOOS (Photo credit should read STEFFI LOOS/AFP/Getty Images)
BERLIN, GERMANY - JULY 19: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge arrive at the Brandenburg Gate during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by DMC/GC Images)
Britain's Prince William, Duke of Cambridge, his wife Kate, the Duchess of Cambridge with their children Prince George and Princess Charlotte arrive at the Tegel irport in Berlin on July 19, 2017. The British royal couple is on a three-day visit in Germany. / AFP PHOTO / POOL / Kay Nietfeld (Photo credit should read KAY NIETFELD/AFP/Getty Images)
Britain's Prince William (R), Duke of Cambridge, his wife Kate, the Duchess of Cambridge with their children Prince George and Princess Charlotte arrive at the Tegel airport in Berlin on July 19, 2017. The British royal couple is on a three-day visit in Germany. / AFP PHOTO / dpa / Bernd Von Jutrczenka / Germany OUT (Photo credit should read BERND VON JUTRCZENKA/AFP/Getty Images)
BERLIN, GERMANY - JULY 19: Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George of Cambridge and Princess Charlotte of Cambridge arrive at Berlin Tegel Airport during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by Samir Hussein/WireImage)
BERLIN, GERMANY - JULY 19: Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge, Prince George and Princess Charlotte arrive at Berlin's Tegel Airport during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by Karwai Tang/WireImage)
BERLIN, GERMANY - JULY 19: Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George of Cambridge, Princess Charlotte of Cambridge arrive at Berlin airport during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by DMC/GC Images)
Prince George arriving at Berlin Airport in Germany.
The Duke of Cambridge and Prince George arriving at Berlin Airport in Germany.
Catherine, The Duchess of Cambridge greets people, at Brandenburg Gate in Berlin, Germany, July 19, 2017. REUTERS/Gregor Fischer/POOL
Prince William, the Duke of Cambridge and his wife Catherine, The Duchess of Cambridge visit Brandenburg Gate in Berlin, Germany, July 19, 2017. REUTERS/Axel Schmidt
HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

Read Full Story
JOIN THE CONVERSATION
Like AOL Lifestyle on Facebook