Duchess Kate wears another 'daring' neckline at garden party in Poland

Duchess Kate and Prince William ended the first day of their five-day tour of Poland and Germany on Monday by attending the Queen's Garden Birthday Party at the Orangery in Lazienki Park, where William delivered a speech in his grandmother's honor. Her Majesty turned 91 years old in April, so the celebration is a belated one.

SEE ALSO: Shy Prince George and smiley Princess Charlotte steal the show as royals arrive in Poland

The Duchess of Cambridge sported an A-line dress by Polish designer Gosia Baczynska, and it's the second time in a week that she's flaunting a "daring" neckline (not to mention that the Alexander McQueen suit the royal mom was seen deplaning in on Monday morning also featured a slightly deep V). The dress, which Express.co.uk is calling "unusual" and "abstract," is a far cry from the simpler styles and patterns Kate's known to wear more frequently.

The princess also opted to style her recently trimmed tresses in a low bun and accessorized with oversized pearl earrings.

See her garden party look below:

9 PHOTOS
Duchess Kate at Garden Party in Warsaw
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Duchess Kate at Garden Party in Warsaw
WARSAW, POLAND - JULY 17: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge prepare to toast HM The Queen at the Queen's Birthday Garden Party at the Orangery, Lazienki Park on day 1 of their official visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Julian Simmonds-Pool/Getty Images)
WARSAW, POLAND - JULY 17: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Queen's Birthday Garden Party at the Orangery, Lazienki Park on day 1 of their official visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Julian Simmonds-Pool/Getty Images)
WARSAW, POLAND - JULY 17: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge toast HM The Queen at the Queen's Birthday Garden Party at the Orangery, Lazienki Park on day 1 of their official visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Julian Simmonds-Pool/Getty Images)
The Duke of Cambridge and The Duchess of Cambridge with the wife of President Duma (left) at the Queen's Birthday Garden Party at the Orangery, Lazienki Park, Warsaw, Poland, on the first day of their five-day tour of Poland and Germany.
The Duchess of Cambridge applauds her husband, The Duke of Cambridge after he has delivered his speech at the Queen's Birthday Garden Party at the Orangery, Lazienki Park, Warsaw, Poland, on the first day of their five-day tour of Poland and Germany.
The Duke of Cambridge and The Duchess of Cambridge with the wife of President Duma (left) at the Queen's Birthday Garden Party at the Orangery, Lazienki Park, Warsaw, Poland, on the first day of their five-day tour of Poland and Germany.
WARSAW, POLAND - JULY 17: Catherine, Duchess of Cambridge listens as Prince William, Duke of Cambridge gives a speech during the Queen's Birthday Garden Party at the Orangery on day 1 of their official visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Julian Simmonds-Pool/Getty Images)
WARSAW, POLAND - JULY 17: Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Poland's First Lady Agata Kornhauser-Duda attend the Queen's Birthday Garden Party at the Orangery, Lazienki Park on day 1 of their official visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Julian Simmonds-Pool/Getty Images)
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Hours earlier, Kate turned heads with a comment about having a third child after being given a gift for a newborn. Could a little brother or sister for George and Charlotte be on the horizon? Only time will tell!

See photos of the royal family arriving in Poland (with shy George and smiley Charlotte):

47 PHOTOS
Royal Tour of Poland and Germany
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Royal Tour of Poland and Germany
WARSAW, POLAND - JULY 17: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge with their children Princess Charlotte of Cambridge and Prince George of Cambridge as they arrive on day 1 of their offical visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Chris Jackson/Getty Images)
WARSAW, POLAND - JULY 17: Prince George of Cambridge and Princess Charlotte of Cambridge peer out of a window as they arrive with Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge on day 1 of their offical visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Chris Jackson/Getty Images)
WARSAW, POLAND - JULY 17: (NO UK SALES FOR 28 DAYS FROM CREATE DATE) Princess Charlotte of Cambridge and Prince George of Cambridge look out of the window of the plane as they arrive at Warsaw airport during an official visit to Poland and Germany on July 17, 2017 in Warsaw, Poland. (Photo by Pool/Samir Hussein/Samir Hussein/WireImage)
WARSAW, POLAND - JULY 17: Prince William, Duke of Cambridge and Prince George of Cambridge arrive at Warsaw airport during an official visit to Poland and Germany on July 17, 2017 in Warsaw, Poland. (Photo by Samir Hussein/Samir Hussein/WireImage)
WARSAW, POLAND - JULY 17: Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge arrive at Warsaw airport during an official visit to Poland and Germany on July 17, 2017 in Warsaw, Poland. (Photo by Samir Hussein/Samir Hussein/WireImage)
WARSAW, POLAND - JULY 17: Prince George of Cambridge arrives at Warsaw airport during an official visit to Poland and Germany on July 17, 2017 in Warsaw, Poland. (Photo by Samir Hussein/Samir Hussein/WireImage)
WARSAW, POLAND - JULY 17: Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George of Cambridge, Princess Charlotte of Cambridge arrive at Warsaw airport during an official visit to Poland and Germany on July 17, 2017 in Warsaw, Poland. (Photo by Samir Hussein/Samir Hussein/WireImage)
WARSAW, POLAND - JULY 17: Prince George and Princess Charlotte arrive at Warsaw airport to start a 3 day tour on July 17, 2017 in Warsaw, Poland. (Photo by Arthur Edwards / Pool/ Getty Images)
WARSAW, POLAND - JULY 17: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge with their children Prince George and Princess Charlotte arrive at Warsaw airport to start a 3 day tour on July 17, 2017 in Warsaw, Poland. (Photo by Arthur Edwards / Pool/ Getty Images)
WARSAW, POLAND - JULY 17: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge with their children Prince George and Princess Charlotte arrive at Warsaw airport to start a 3 day tour on July 17, 2017 in Warsaw, Poland. (Photo by Arthur Edwards / Pool/ Getty Images)
WARSAW, POLAND - JULY 17: (NO UK SALES FOR 28 DAYS FROM CREATE DATE) Prince George of Cambridge arrives at Warsaw airport during an official visit to Poland and Germany on July 17, 2017 in Warsaw, Poland. (Photo by Pool/Samir Hussein/Samir Hussein/WireImage)
WARSAW, POLAND - JULY 17: (NO UK SALES FOR 28 DAYS FROM CREATE DATE) Princess Charlotte of Cambridge and Prince George of Cambridge look out of the window of the plane as they arrive at Warsaw airport during an official visit to Poland and Germany on July 17, 2017 in Warsaw, Poland. (Photo by Pool/Samir Hussein/Samir Hussein/WireImage)
WARSAW, POLAND - JULY 17: (NO UK SALES FOR 28 DAYS FROM CREATE DATE) Princess Charlotte of Cambridge and Prince George of Cambridge look out of the window of the plane as they arrive at Warsaw airport during an official visit to Poland and Germany on July 17, 2017 in Warsaw, Poland. (Photo by Pool/Samir Hussein/Samir Hussein/WireImage)
WARSAW, POLAND - JULY 17: (NO UK SALES FOR 28 DAYS FROM CREATE DATE) Catherine, Duchess of Cambridge, Princess Charlotte of Cambridge, Prince William, Duke of Cambridge and Prince George of Cambridge arrive at Warsaw airport during an official visit to Poland and Germany on July 17, 2017 in Warsaw, Poland. (Photo by Pool/Samir Hussein/Samir Hussein/WireImage)
WARSAW, POLAND - JULY 17: (NO UK SALES FOR 28 DAYS FROM CREATE DATE) Catherine, Duchess of Cambridge, Princess Charlotte of Cambridge, Prince William, Duke of Cambridge and Prince George of Cambridge arrive at Warsaw airport during an official visit to Poland and Germany on July 17, 2017 in Warsaw, Poland. (Photo by Pool/Samir Hussein/Samir Hussein/WireImage)
WARSAW, POLAND - JULY 17: Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge arrive at the airport during an official visit to Poland and Germany on July 17, 2017 in Warsaw, Poland. (Photo by DMC/GC Images)
WARSAW, POLAND - JULY 17: Catherine, Duchess of Cambridge carries Princess Charlotte of Cambridge as they arrive with Prince William, Duke of Cambridge and Prince George of Cambridge on day 1 of their offical visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Chris Jackson/Getty Images)
WARSAW, POLAND - JULY 17: Prince William, Duke of Cambridge and Prince George of Cambridge as they arrive with Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge on day 1 of their offical visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Chris Jackson/Getty Images)
WARSAW, POLAND - JULY 17: Prince William, Duke of Cambridge and Prince George of Cambridge as they arrive with Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge on day 1 of their offical visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Chris Jackson/Getty Images)
WARSAW, POLAND - JULY 17: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge with their children Princess Charlotte of Cambridge and Prince George of Cambridge as they arrive on day 1 of their offical visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Chris Jackson/Getty Images)
WARSAW, POLAND - JULY 17: Prince George of Cambridge as he arrives with Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge on day 1 of their offical visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Chris Jackson/Getty Images)
WARSAW, POLAND - JULY 17: Prince William, Duke of Cambridge speaks with Prince George of Cambridge as they arrive with Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge on day 1 of their offical visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Chris Jackson/Getty Images)
WARSAW, POLAND - JULY 17: Prince William, Duke of Cambridge speaks with Prince George of Cambridge as they arrive with Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge on day 1 of their offical visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Chris Jackson/Getty Images)
WARSAW, POLAND - JULY 17: Catherine, Duchess of Cambridge carries Princess Charlotte of Cambridge as they arrive with Prince William, Duke of Cambridge and Prince George of Cambridge on day 1 of their offical visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Samir Hussein/Samir Hussein/WireImage)
WARSAW, POLAND - JULY 17: Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge, Prince George of Cambridge and Princess Charlotte of Cambridge are seen arriving at the airport during an official visit to Poland and Germany on July 17, 2017 in Warsaw, Poland. (Photo by DMC/GC Images)
WARSAW, POLAND - JULY 17: Prince William, Duke of Cambridge speaks with Prince George of Cambridge as they arrive with Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge on day 1 of their offical visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Chris Jackson/Getty Images)
WARSAW, POLAND - JULY 17: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge with their children Princess Charlotte of Cambridge and Prince George of Cambridge as they arrive on day 1 of their offical visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Samir Hussein/Samir Hussein/WireImage)
Note alternate crop The Duke and Duchess of Cambridge arrive at Warsaw's Chopin Airport with Prince George and Princess Charlotte for the start of their five-day tour of Poland and Germany.
WARSAW, POLAND - JULY 17: Catherine, Duchess of Cambridge carries Princess Charlotte of Cambridge as they arrive with Prince William, Duke of Cambridge and Prince George of Cambridge on day 1 of their offical visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Samir Hussein/Samir Hussein/WireImage)
Prince William, the Duke of Cambridge and Catherine, The Duchess of Cambridge are seen at the museum of former German Nazi concentration camp Stutthof in Sztutowo, Poland July 18, 2017. REUTERS/Kacper Pempel
WARSAW, POLAND - JULY 17: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge toast HM The Queen at the Queen's Birthday Garden Party at the Orangery, Lazienki Park on day 1 of their official visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Julian Simmonds-Pool/Getty Images)
WARSAW, POLAND - JULY 17: Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Poland's First Lady Agata Kornhauser-Duda attend the Queen's Birthday Garden Party at the Orangery, Lazienki Park on day 1 of their official visit to Poland on July 17, 2017 in Warsaw, Poland. (Photo by Julian Simmonds-Pool/Getty Images)
Prince William, the Duke of Cambridge and Catherine, The Duchess of Cambridge meet Holocaust survivors during their visit at the museum of former German Nazi concentration camp Stutthof in Sztutowo, Poland July 18, 2017. REUTERS/Kacper Pempel
Prince William, the Duke of Cambridge, his wife Catherine, The Duchess of Cambridge, Prince George and Princess Charlotte arrive at Tegel airport in Berlin, Germany, July 19, 2017. REUTERS/Fabrizio Bensch
Prince William, the Duke of Cambridge, his wife Catherine, The Duchess of Cambridge, Prince George and Princess Charlotte arrive at Tegel airport in Berlin, Germany, July 19, 2017. REUTERS/Kay Nietfeld/POOL
Prince William, the Duke of Cambridge, his wife Catherine, The Duchess of Cambridge, Prince George and Princess Charlotte arrive at Tegel airport in Berlin, Germany, July 19, 2017. REUTERS/Kay Nietfeld/POOL
Catherine, The Duchess of Cambridge leaves the charity Strassenkinder e.V. building in Berlin, Germany, July 19, 2017. REUTERS/Jens Kalaene/POOL
BERLIN, GERMANY - JULY 19: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit Strassenkinder, a charity which supports young people from disadvantaged backgrounds during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. The Duke and Duchess will also meet representatives from the Robert Enke Foundation. (Photo by Chris Jackson/Getty Images)
Britain's Prince William (R), Duke of Cambridge, and his wife Kate, the Duchess of Cambridge with 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 visit Strassenkinder, a charity which supports young people from disadvantaged backgrounds during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. The Duke and Duchess will also meet representatives from the Robert Enke Foundation. (Photo by Chris Jackson/Getty Images)
BERLIN, GERMANY - JULY 19: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge visit the Brandenburg Gate during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by Samir Hussein/WireImage)
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 Franziska Krug/Getty Images)
BERLIN, GERMANY - JULY 19: Princess Charlotte of Cambridge arrives at Berlin Tegel Airport during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by Chris Jackson/Getty Images)
BERLIN, GERMANY - JULY 19: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge visit the Brandenburg Gate during an official visit to Poland and Germany on July 19, 2017 in Berlin, Germany. (Photo by Chris Jackson/Getty Images)
Britain's Prince William, Duke of Cambridge (L), his wife Kate, the Duchess of Cambridge (unseen) with their children Prince George and Princess Charlotte (Unseen) 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 (L) and his wife Kate, the Duchess of Cambridge (C) are seen on the terrace of the Chancellery in Berlin on July 19, 2017 during a meeting with German Chancellor Angela Merkel. The British royal couple is on a three-day visit in Germany. / AFP PHOTO / Odd ANDERSEN (Photo credit should read ODD ANDERSEN/AFP/Getty Images)
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