Prince William and Kate Middleton
Britain's Prince William and his wife Catherine, Duchess of Cambridge, pose in front of Uluru, also known as Ayers Rock, April 22, 2014. Britain's Prince William, his wife Kate and their son Prince George are on a three-week tour of New Zealand and Australia. Reuters

The effect of her third public appearance after the announcements of her second pregnancy was so massive that the dress Princess Kate Middleton wore to the party has already been sold out. After the Princess flaunted the outfit, the Woven black Temperley fit-and -flare frock sold out within 24 hours according to the brand's website.

Princess Middleton's public appearance after the announcement of her second pregnancy received a lot of media attention. The Duchess of Cambridge is known for her style and charm. Her second pregnancy has further improved her persona as she looked absolutely gorgeous after the bouts of morning sickness that she reportedly suffered from.

The mother of 15-month-old Prince George has been suffering from a severe case of hyperemesis gravidarum, which restricts her from participating in public activities. She now seemed to have recovered as she appeared quite bubbly, as well as observed to be acting like her usual charming self.

The famed dress is part of Temperley's pre-fall 2014 collection. It is a knee length dress with long sleeves and woven panels creating a peek-a-boo effect. Hours after photos and videos of the Princess circulated in the tabloids, people started logging in the brand's website to grab one for them as well.

This is not the first time that the Duchess is praised for her style statement and wardrobe choices. During her first pregnancy, she was often spotted flaunting various designer cut dresses with extraordinary ease along with the baby bump.

This first public appearance since the announcement of her second pregnancy took place on Tuesday. She was also photographed wearing an Alexander McQueen coatdress to welcome Singapore's president to London alongside her husband Prince William.

Later that evening, Princess Kate Middleton donned a Jenny Packham wrap dress with a slit showing her knee. She was attending the ceremony of 2014 Wildlife Photograph Awards at Natural History Museum. Eyewitnesses told E!News that the Duchess looked healthy and happy.

In the meantime, a representative of the Royal has confirmed that although the princess is feeling much better now, she does not have any more engagements planned in the near future, as told by Radar Online.