Prince Harry, Meghan Markle mark Prince Charles' birthday with new photo of Archie

Happy birthday, Prince Charles

The Prince of Wales is celebrating his 71st birthday on Thursday with a flood of well-wishes from the royal family. Although the prince is spending his birthday during the two-day royal tour of India with the Duchess of Cornwall, his children took to social media to wish their father a happy birthday. 

To mark the occasion, Prince Harry and Meghan Markle shared a previously unseen photo of baby Archie with the prince, which was taken during his christening back in July. Proud new dad Prince Harry is seen gazing at his newborn in his arms, while Charles looks on.

"Happy birthday to His Royal Highness The Prince of Wales - Sir, Pa, Grandpa!" the Sussexes captioned their photo. Prince William and Duchess Kate also celebrated the royal's birthday on their Instagram. The first photo, captured by photographer Chris Jackson to mark Prince Charles' milestone birthday last year, shows him playing with his grandson Prince Louis. 

Another photo shared by Kensington Palace captures Prince William, Prince Harry and Prince Wales all dressed up in their traditional military gear, laughing. 

Charles' younger brother the Duke of York also posted a photo of the two to Instagram to mark his big day. The black and white snapshot, which was taken in 1960, shows the Prince of Wales cradling newborn Prince Andrew in his lap.

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Prince Charles' childhood in photos
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Prince Charles' childhood in photos
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Elisabeth II. *21.04.1926-Koenigin von GB seit 1953- Portrait mit ihrem Sohn Prinz Charles- November 1949 (Photo by ullstein bild/ullstein bild via Getty Images)
LONDRES, ROYAUME-UNI - DECEMBRE 1948: Le Prince Charles dans les bras de sa mere la Princesse Elisabeth lors de son bapteme, en decembre 1948 a Londres, Royaume-Uni. (Photo by Keystone-France\Gamma-Rapho via Getty Images)
Postcard of Princess (and future Queen) Elizabeth as he holds her firstborn son, Prince Charles, late November 1948. Also pictured are, King George VI, known as Albert (left), Prince Philip, the Duke of Edinburgh (behind Elizabeth), and Queen Elizabeth (later known as the Queen Mother). (Photo by Rykoff Collection/Getty Images)
La Reine Mary avec son arrière-petit-fils le Prince Charles Philip Arthur George après son baptême à Buckingham Palace en décembre 1948 à Londres au Royaume-Uni. (Photo by KEYSTONE-FRANCE/Gamma-Rapho via Getty Images)
15th December 1948: Queen Elizabeth (1900 - 2002) holding her grandson, Prince Charles Philip Arthur George after his christening at Buckingham Palace. (Photo by Keystone/Getty Images)
LONDRES, ROYAUME-UNI - 15 DECEMBRE: La Princesse Elizabeth avec son bebe le Prince Charles apres son bapteme au Palais de Buckingham, le 15 decembre 1949 a Londres, Royaume-Uni. (Photo by Keystone-France\Gamma-Rapho via Getty Images)
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Prinz Charles *1948, im Kinderwagen mit seinem Kindermädchen,, Ms. Lighthouse (Photo by ullstein bild via Getty Images)
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Charles, Prince of Wales (*14.11.1948-), Thronfolger, GB (Photo by ullstein bild via Getty Images)
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Charles, Prince of Wales *14.11.1948-Thronfolger, GB- mit einer Kamera- 1953 (Photo by ullstein bild/ullstein bild via Getty Images)
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Charles, Prince of Wales *14.11.1948-Thronfolger, GB- Ganzkoerperaufnahme (Photo by ullstein bild/ullstein bild via Getty Images)
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Prinz Charles *1948, im Kinderwagen mit seinem schottischen, Kindermädchen Mabel Anderson (Photo by ullstein bild via Getty Images)
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Charles, Prince of Wales (*14.11.1948-), Thronfolger, GB, - mit einem Corgi-Hund, - 1954 (Photo by ullstein bild via Getty Images)
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Charles, Prince of Wales *14.11.1948-Thronfolger, GB- mit seiner Mutter und seinem Tretauto- 1954 (Photo by ullstein bild/ullstein bild via Getty Images)
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Charles, Prince of Wales *14.11.1948-Thronfolger, GB- mit seiner Großmutter Elizabeth Koeniginmutter und seiner Tante Princess Margaret- 1954 (Photo by ullstein bild/ullstein bild via Getty Images)
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Charles, Prince of Wales *14.11.1948-Thronfolger, GB- 1957 (Photo by ullstein bild/ullstein bild via Getty Images)
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Charles, Prince of Wales *14.11.1948-Thronfolger, GB- Kinderportrait im Schottenrock- 1955 (Photo by ullstein bild/ullstein bild via Getty Images)
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Charles, Prince of Wales (*14.11.1948-), Thronfolger, GB, - Charles (3.v.r.) mit Mitschuelern beim, Fußballspiel (Photo by ullstein bild via Getty Images)
JANUARY 1: Undated picture showing Charles Phillip Arthur George known as Prince of Wales Charles, who was born 15 December 1948. He is the first-born child of princess Elizabeth and the duke of Edinburgh. (B&W ONLY) (Photo credit should read STF/AFP via Getty Images)
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Charles, Prince of Wales (*14.11.1948-), Thronfolger, GB, - Einschulung in Cheam School mit, Schulleiter Beck (Photo by ullstein bild via Getty Images)
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Charles, Prince of Wales *14.11.1948-Thronfolger, GB (Photo by ullstein bild/ullstein bild via Getty Images)
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Charles, Prince of Wales *14.11.1948-Thronfolger, GB- mit seiner Schwester, Princess Anne (Photo by ullstein bild/ullstein bild via Getty Images)
UNITED KINGDOM - OCTOBER 18: The Duke of Edinburgh walks with his son and Captain Iain Tennant in front of Gordonstoun, Prince Charlesďż˝ exclusive public school. Heir to the throne Prince Charles (born 1948) went on to take History at Cambridge. (Photo by SSPL/Getty Images)
UNITED KINGDOM : Prince Charles (born 1948) was the first heir to the throne to take a degree. He obtained a BA honours degree in history. He is seen here in the centre of the third row from the back. (Photo by SSPL/Getty Images)
April 1969: Prince Charles, the Prince of Wales, (1948- ) son of Queen Elizabeth II and Prince Philip, the Duke of Edinburgh, heir to the British throne, seen here in his room at Trinity College when he was an undergraduate. (Photo by Central Press/Getty Images)
(GERMANY OUT) Charles, Prince of Wales (*14.11.1948-), Thronfolger, GB, - Portrait in Uniform, - 1972 (Photo by Rogge / ullstein bild via Getty Images)
LONDRES, ROYAUME-UNI - 14 NOVEMBRE: Dans la voiture, le Prince Charles avec sa nurse l'aidant a saluer la foule, au retour de sa fete d'anniversaire, le 14 novembre 1949 a Londres, Royaume-Uni. (Photo by Keystone-France\Gamma-Rapho via Getty Images)
These are the official first birthday photographs of Bonnie Prince Charles of England. The baby, son of Princess Elizabeth, whom he is pictured with, and the Duke of Edinburgh, is a big boy for his age - weighing 24 1/2 pounds at 11 1/2 months, and being t. (Photo by Bettmann/Corbis/Getty Images)
Prince Charles, son of Princess Elizabeth and the Duke of Edinburgh, beams from his pram as the photographer clicks the shutter during an outing in Green Park. The little boy studying the baby is Prince Richard, son of the Duke and Duchess of Gloucester an. (Photo by Bettmann/Corbis/Getty Images)
Picture taken on July 20, 1949 at Windlesham Moor showing Queen Elizabeth II and Prince Philip, Duke of Edinburgh with their baby Prince Charles. (Photo by - / INTERCONTINENTALE / AFP) (Photo credit should read -/AFP via Getty Images)
Queen Elizabeth II with her baby Prince Charles in the grounds of Windlesham Moor, country home in Surrey (Photo by PA Images via Getty Images)
Prince Charles, later The Prince of Wales, is lifted up by his father The Duke of Edinburgh, in the grounds of Windlesham Moor, the country home in Surrey of Princess Elizabeth and the Duke. (Photo by PA Images via Getty Images)
Princess Elizabeth and the Duke of Edinburgh hold their first child Prince Charles, aged 6 months. (Photo by PA Images via Getty Images)
18th December 1959: Prince Charles at the wheel of a dodgem car at Bertram Mills Circus and Funfair at Olympia, London. (Photo by Keystone/Getty Images)
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Elisabeth II. *21.04.1926-Koenigin von GB seit 1953- mit Prinz Philip und den Kindern Charles und Anne in Windsor Castle- Juni 1959 (Photo by ullstein bild/ullstein bild via Getty Images)
BALMORAL, ROYAUME-UNI - 29 AOUT: Le Président américain Dwight Eisenhower (gauche) et son fils le Major John Eisenhower sur la pelouse du chateau de Balmoral avec la Reine Elizabeth et ses enfants le Prince Charles et la Princesse Anne le 29 aout 1959 à Balmoral, Royaume-Uni. (Photo by Keystone-France\Gamma-Rapho via Getty Images)
(Eingeschränkte Rechte für bestimmte redaktionelle Kunden in Deutschland. Limited rights for specific editorial clients in Germany.) Elisabeth II. *21.04.1926-Koenigin von GB seit 1953- mit Ehemann Prinz Philip und den Kindern Charles und Anne in Windsor Castle- Juni 1959 (Photo by ullstein bild/ullstein bild via Getty Images)
The Prince of Wales visits HMS Eagle at Weymouth, 29th April 1959. (Photo by Staff/Mirrorpix/Getty Images)
Queen Elizabeth II and the Prince of Wales visit HMS Eagle at Weymouth, 29th April 1959. (Photo by Staff/Mirrorpix/Getty Images)
1959: Prince Charles wearing his uniform for Cheam School, Surrey. (Photo by Hulton Archive/Getty Images)
PA NEWS PHOTO 22/12/58 THE PRINCE OF WALES WITH SISTER PRINCESS ANNE WAVE AS THEY ARRIVE AT LONDON'S LIVERPOOL STREET TRAIN STATION TO BOARD A TRAIN FOR SANDRINGHAM TO SPEND THE CHRISTMAS HOLIDAY WITH THEIR PARENTS AND OTHER MEMBERS OF THE ROYAL FAMILY (Photo by PA Images via Getty Images)
The Prince of Wales with his father, the Duke of Edinburgh during a motorboat race up the river Medina at Cowes, Isle of Wight. (Photo by PA Images via Getty Images)
The Prince of Wales walking to Cheam School in Berkshire. (Photo by PA Images via Getty Images)
Prince Charles with his sister Princess Anne meet David Attenborough and Cocky, the cockatoo brought back from his last Zoo Quest expedition, at the BBC Television Studios in Lime Grove, London. (Photo by PA Images via Getty Images)
The young Prince Charles shares a programme with his neighbor whilst watching an event at Royal Ascot Horse Jumping Show, England, April 24th 1958. (Photo by Fox Photos/Hulton Archive/Getty Images)
Undated picture of Queen Elizabeth II with young Prince Charles and Princess Anne, taken in an unknown location. (Photo by - / - / AFP) (Photo by -/-/AFP via Getty Images)
La princesse Anne et son frère le prince Charles photographiés sur la pelouse de parc de Windsor, au Royaume-Uni en 1958. (Photo by KEYSTONE-FRANCE/Gamma-Rapho via Getty Images)
LONDRES, ROYAUME-UNI - 14 NOVEMBRE: Portrait du Prince Charles a 9 ans posant contre le piano au Palais de Buckingham, le 14 novembre 1957 a Londres, Royaume-Uni. (Photo by Keystone-France\Gamma-Rapho via Getty Images)
The Duke of Edinburgh, followed by The Queen with Prince Charles and Princess Anne, both wearing kilts, during a holiday at Balmoral. (Photo by PA Images via Getty Images)
WINDSOR, ROYAUME-UNI - 13 JUILLET: Le Prince Charles qui est retourne a la voiture recuperer son gilet est venu avec la Princesse Anne regarder leur pere jouer un match de Polo, le 13 juillet 1957 a Windsor, Royaume-Uni. (Photo by Keystone-France\Gamma-Rapho via Getty Images)
Prince Charles (second from left) playing handball at the Hill House School sports day, watched by the Duke of Edinburgh, Queen Elizabeth II and Princess Anne (Photo by PA Images via Getty Images)
8th July 1957: Prince Charles boards a London Transport bus from the Hill House School in Kensington to Chelsea for the school's Sports Day. (Photo by Reg Speller/Fox Photos/Getty Images)
PA NEWS PHOTO 10/6/57 THE PRINCE OF WALES AND SISTER PRINCESS ANNE JOIN IN THE TASK OF TREADING DOWN THE DIVOTS KICKED UP BY THE PONIES DURING A POLO MATCH IN WHICH THEIR FATHER THE DUKE OF EDINBURGH WAS PARTICIPATING AT WINDSOR GREAT PARK (Photo by PA Images via Getty Images)
Prince Charles driving away from Holkham Bay, Norfolk, after a visit to the beach. He is spending a holiday with the Earl and Countess of Leicester at Holkham Hall, following an operation for the removal of his tonsils and adenoids. (Photo by PA Images via Getty Images)
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