Prince William And Kate Middleton's Kids Thank COVID-19 Health-Care Workers

Prince William, Kate Middleton and their family are expressing their gratitude to all of the hardworking people on the front lines of the coronavirus pandemic.

In a short video posted to their social media accounts on Thursday, the couple’s three kids are standing outside in a garden. Prince George, Princess Charlotte and Prince Louis are smiling as they clap enthusiastically together.

In the short clip, George, age 6, and Charlotte, 4, beam at the camera. Louis, the littlest Cambridge, doesn’t look like he entirely understands what clapping entails, and looks up at his older brother and sister a few times for guidance, but he’s certainly trying. This is the first time we’ve seen Louis, who will turn two next month, standing up on his own.

“To all the doctors, nurses, carers, GPs, pharmacists, volunteers and other NHS staff working tirelessly to help those affected by #COVID19: thank you,” the caption reads. The NHS is Britain’s National Health Service.

They also use the hashtag #ClapForOurCarers, which has very quickly become a social media phenomenon in the U.K. On Thursday evening, British time, people around the country stood on balconies or doorsteps to clap for health-care workers and other people risking their own health to help.

The Cambridge video is among thousands of other posts, photos and messages showing gratitude for the people working on the front lines.

On Wednesday, Prince William’s father Prince Charles announced publicly that he had tested positive for coronavirus. A Buckingham Palace spokesperson said Charles had spoken to both of his sons about his diagnosis, and with his mother, Queen Elizabeth II. No one else in the Royal Family has commented publicly.

Last week, William and Kate visited a hospital treating coronavirus patients. “All of us have a part to play if we’re going to protect the most vulnerable,” William wrote on Instagram.

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The Duke and Duchess of Cambridge With Their Son Prince George Alexander Louis of Cambridge In Bucklebury

BUCKLEBURY, BERKSHIRE - AUGUST 2013: (EDITORIAL USE ONLY - NO SALES) In this handout image provided by Kensington Palace, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge pose for a photograph with their son, Prince George Alexander Louis of Cambridge in the garden of the Middleton family home in August 2013 in Bucklebury, Berkshire. (Photo by Michael Middleton/Kensington Palace via Getty Images)

The Duke and Duchess of Cambridge With Their Son Prince George Alexander Louis of Cambridge In Bucklebury

BUCKLEBURY, BERKSHIRE - AUGUST 2013: (EDITORIAL USE ONLY - NO SALES) In this handout image provided by Kensington Palace, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge pose for a photograph with their son, Prince George Alexander Louis of Cambridge, surrounded by Lupo, the couple's cocker spaniel, and Tilly the retriever (a Middleton family pet) in the garden of the Middleton family home in August 2013 in Bucklebury, Berkshire. (Photo by Michael Middleton - WPA Pool/Getty Images)

Kate Middleton And Prince William Show Newborn Son

The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

Kate Middleton And Prince William Show Newborn Son

The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

Kate Middleton And Prince William Show Newborn Son

The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

Kate Middleton And Prince William Show Newborn Son

The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

Kate Middleton And Prince William Show Newborn Son

The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

Kate Middleton And Prince William Show Newborn Son

The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

Kate Middleton And Prince William Show Newborn Son

The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

Kate Middleton And Prince William Show Newborn Son

The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

Kate Middleton And Prince William Show Newborn Son

The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

Kate Middleton And Prince William Show Newborn Son

The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

Kate Middleton And Prince William Show Newborn Son

The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

Kate Middleton And Prince William Show Newborn Son

The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

Kate Middleton And Prince William Show Newborn Son

Kate Middleton And Prince William Show Newborn Son

The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time. (AP Photo/John Stillwell, Pool)

Kate Middleton And Prince William Show Newborn Son

Kate, Duchess of Cambridge holds the Prince of Cambridge, Tuesday July 23, 2013, as they pose for photographers outside St. Mary's Hospital exclusive Lindo Wing in London where the Duchess gave birth on Monday July 22. The Royal couple are expected to head to London’s Kensington Palace from the hospital with their newly born son, the third in line to the British throne. (AP Photo/Alastair Grant)

Kate Middleton And Prince William Show Newborn Son

The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

Kate Middleton And Prince William Show Newborn Son

The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

Kate Middleton And Prince William Show Newborn Son

The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

Kate Middleton And Prince William Show Newborn Son

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital with their newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

Kate Middleton And Prince William Show Newborn Son

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.  (Photo by Peter Macdiarmid/Getty Images)

Kate Middleton And Prince William Show Newborn Son

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.  (Photo by Peter Macdiarmid/Getty Images)

Kate Middleton And Prince William Show Newborn Son

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital with their newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

Kate Middleton And Prince William Show Newborn Son

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital with their newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

Kate Middleton And Prince William Show Newborn Son

Prince William, Duke of Cambridge leaves the Lindo Wing of St Mary's Hospital with his newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

Kate Middleton And Prince William Show Newborn Son

Catherine, the Duchess of Cambridge (L) looks on as Prince William the Duke of Cambridge holds his new-born baby boy in front of the world's media outside the Lindo Wing of St Mary's Hospital in London on July 23, 2013. The baby was born on Monday afternoon weighing eight pounds six ounces (3.8 kilogrammes). The baby, titled His Royal Highness, Prince (name) of Cambridge, is directly in line to inherit the throne after Charles, Queen Elizabeth II's eldest son and heir, and his eldest son William.

Kate Middleton And Prince William Show Newborn Son

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital with their newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

Kate Middleton And Prince William Show Newborn Son

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital with their newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

Kate Middleton And Prince William Show Newborn Son

Prince William and Catherine, Duchess of Cambridge show their new-born baby boy to the world's media outside the Lindo Wing of St Mary's Hospital in London on July 23, 2013. The baby was born on Monday afternoon weighing eight pounds six ounces (3.8 kilogrammes). The baby, titled His Royal Highness, Prince (name) of Cambridge, is directly in line to inherit the throne after Charles, Queen Elizabeth II's eldest son and heir, and his eldest son William.

Kate Middleton And Prince William Show Newborn Son

Prince William and Catherine, Duchess of Cambridge show their new-born baby boy to the world's media outside the Lindo Wing of St Mary's Hospital in London on July 23, 2013. The baby was born on Monday afternoon weighing eight pounds six ounces (3.8 kilogrammes). The baby, titled His Royal Highness, Prince (name) of Cambridge, is directly in line to inherit the throne after Charles, Queen Elizabeth II's eldest son and heir, and his eldest son William.

Kate Middleton And Prince William Show Newborn Son

Catherine, Duchess of Cambridge leaves the Lindo Wing of St Mary's Hospital with her newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

Kate Middleton And Prince William Show Newborn Son

Prince William takes the baby from Catherine, Duchess of Cambridge as they show their new-born baby boy to the world's media outside the Lindo Wing of St Mary's Hospital in London on July 23, 2013. The baby was born on Monday afternoon weighing eight pounds six ounces (3.8 kilogrammes). The baby, titled His Royal Highness, Prince (name) of Cambridge, is directly in line to inherit the throne after Charles, Queen Elizabeth II's eldest son and heir, and his eldest son William.

Kate Middleton And Prince William Show Newborn Son

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Chris Jackson/Getty Images)

Kate Middleton And Prince William Show Newborn Son

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge hold their newborn son outside The Lindo Wing at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.  (Photo by Peter Macdiarmid/Getty Images)

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This article originally appeared on HuffPost.