Christening Of Prince Louis Of Cambridge At St James's Palace on July 09, 2018 in London, England.

 Catherine Duchess of Cambridge speaks to Archbishop of Canterbury Justin Welby as she arrives carrying Prince Louis for his christening service at the Chapel Royal, St James's Palace on July 09, 2018 in London, England.

Prince Harry, Duke of Sussex and wife Meghan, Duchess of Sussex speak to Archbishop of Canterbury Justin Welby as they arrive at the palace

Catherine, Duchess of Cambridge left the chapel carrying Prince Louis while Prince William, Duke of Cambridge emerged hand-in-hand with Prince George and Princess Charlotte during the christening of their youngest son.

The Duchess of Cambridge looked every inch the proud mum as she left Prince Louis' christening with her infant son cradled in her arms. Her husband Prince William, Duke of Cambridge followed behind with Prince George, four, and Princess Charlotte, three

Britain's Princess Charlotte of Cambridge and Britain's Prince George of Cambridge hold hands with their father, Britain's Prince William, Duke of Cambridge, as Britain's Prince Louis of Cambridge is carried by his mother, Britain's Catherine, Duchess of Cambridge after his christening service at the Chapel Royal, St James's Palace, London on July 9, 2018.

Prince Harry attended the christening of Prince Louis of Cambridge with his wife the Duchess of Sussex, 36, who wore an olive green dress by Ralph Lauren

Meghan, Duchess of Sussex looked elegant in an olive green shift dress by Ralph Lauren and a coordinating hat by milliner Stephen Jones as she joined husband Prince Harry, Duke of Sussex at Prince Louis' christening at the Chapel Royal at St James' Palace

The Duchess of Cambridge speaks to Archbishop of Canterbury Justin Welby as she arrives carrying Prince Louis of Cambridge

Prince Louis of Cambridge's Godparents Lucy Middleton, cousin of the Duchess of Cambridge (left), Harry Aubrey-Fletcher (behind) and Hannah Carter (foreground with husband Robert) arrived for the service at the Chapel Royal at St James' Palace

Prince Louis of Cambridge's Grandparents Michael Middleton looked smart in a dark grey suit while his wife Carole Middleton looked elegant in a seafoam dress and matching hat, smiled as they arrived at the chapel for the service at the Chapel Royal at St James' Palace.

Pregnant Pippa Middleton looked radiant in baby blue, arrived for the christening of her nephew Prince Louis of Cambridge at St James's Palace alongside her husband James Matthews.

Pregnant Pippa Middleton in a powder blue dress, she accessorized with a statement-hat in the same shade of blue as she made her way into the service for the christening of her nephew Prince Louis of Cambridge at St James's Palace

James Middleton accompanied Lady Laura Meade, one of Prince Louis' six godparents, to the service at the Chapel Royal at St James' Palace on July 9, 2018

Catherine, Duchess of Cambridge holds Prince Louis while Prince William holds his eldest son Prince George and daughter Princess Charlotte's hand as the family leaves St James's Palace after the christening of their third child.

Prince Harry and Meghan Duchess of Sussex leave after the christening service of Prince Louis at the Chapel Royal

Prince Charles and his wife Camilla, Duchess of Cornwall Duchess who wore Fiona Clare and a hat by Locke, were among the senior members of the royal family who attended the service at the Chapel Royal at St James' Palace

The Duchess of Cambridge speaks to Archbishop of Canterbury Justin Welby who asked if Prince Louis was asleep

A confident Princess Charlotte shook hands with church officials as she made her way into her younger brother's christening alongside with her father Prince William, Duke of Cambridge while her mother Catherine, Duchess of Cambridge  holds Prince Louis speaks to Archbishop of Canterbury Justin Welby

Catherine, Duchess of Cambridge in an Alexander McQueen dress for the occasion, finishing the look with a hat by Jane Taylor, while Prince Louis was dressed in the cream, frilly lace royal christening gown - a replica of the intricate robe made for Queen Victoria's eldest daughter in 1841, as she arrived the Chapel Royal at St James's Palace, London

Proud mother Catherine, Duchess of Cambridge gazed adoringly at her 11-week-old sleeping infant son Prince Louis of Cambridge outside the chapel as she left intimate service at Chapel Royal at St James's Palace, London, alongside a select group of family and close friends.

Prince William held hands with Prince George, four, and Princess Charlotte, three, while Catherine, Duchess of Cambridge carried their youngest son Prince Louis as the family arrived for the christening on Monday afternoon, July 9, 2018

Prince George of Cambridge was seen attending his little brother's christening wearing a pair of navy blue shorts with matching shoes and socks and a gorgeous cotton short-sleeved, white Amaia Kids Daniel shirt complete with navy piping.

Prince William, Duke of Cambridge held hands with Princess Charlotte who was adorable in a patterned blue dress, and Prince George who was dressed in a white Peter Pan collar Amaia Kids Daniel shirt and his signature shorts while Catherine, Duchess of Cambridge wore an Alexander McQueen dress with a hat by Jane Taylor as she carried their youngest son Prince Louis who was dressed in the cream, frilly lace royal christening gown.

(L-R) Pregnant Pippa Middleton looked stunning in a pale blue knee-length custom dress by Alessandra Rich and towering stiletto heels with an ankle strap are seen making her way to her nephew's christening today alongside her cousin, Lucy Middleton, who was named as one of Prince Louis' godparents

(L-R) Pippa Middleton wears a baby blue hat to match her dress as she arrives her cousin Lucy Middleton who was named as one of Prince Louis' godparents at St James's Palace for the christening of her nephew

Prince Louis of Cambridge, dressed in a traditional christening gown - a replica of the intricate robe made for Queen Victoria's eldest daughter in 1841, was sound asleep in his mother's arms

Catherine, Duchess of Cambridge wore an Alexander McQueen dress for the occasion, teamed with a very striking hat by Jane Taylor, consisting of a wide cream band trimmed with white flowers and accessorised with new pearl cluster earrings, arrived holding a sleeping Prince Louis in her arms who was dressed in the cream, frilly lace royal christening gown

Prince Louis' godmother: Lucy Middleton is a cousin to the Duchess of Cambridge on her father's side and works as a solicitor in London specializing in media litigation for Atkins Thomson.

Prince Louis' godfather: Major Nicholas van Cutsem (pictured on his wedding to wife Alice) has been firm friends of the Prince of Wales and his sons for years

Prince Louis' godmother: Mrs. Robert Carter (Hannah), pictured with her husband, went to Marlborough College with Kate Middleton, where they played on several of the same sports teams and was a couple of years above her sister Pippa at the same school and also played sports.

Prince Louis’ godfather Harry Aubrey-Fletcher is one of Prince William's oldest friends, having attended both Ludgrove prep school and Eton with the Prince. Harry is the youngest son of Sir Henry Aubrey-Fletcher, 8th Baronet and Lord Lieutenant of Buckinghamshire. His similarly blue-blooded wife, who will also attend Prince Louis' christening, is the eldest daughter of Edward Stourton, the 24th Baron Stourton, 28th Baron Segrave, 27th Baron Mowbray.

Queen Elizabeth II and Prince Philip, Duke of Edinburgh missed Prince Louis's christening. The decision is understood not to have been taken on health grounds, and to have been mutually agreed by the Queen and the Cambridge's some time ago.

Catherine, Duchess of Cambridge wore an Alexander McQueen dress for the occasion, she teamed the ensemble with a very striking Jane Taylor hat, with a wide cream band trimmed with white flowers.  She accessorized with new pearl cluster earrings and wore her signature nude heels, as she gazes lovingly at sleeping Prince Louis, who was dressed in the cream, frilly lace royal christening gown.

Grandmother Carole Middleton smiled who was elegant in a seafoam dress and feather knot disc hat by London based milliner Juliette Botterill, as she arrived at the chapel for the service at the Chapel Royal at St James's Palace, London

Pippa Middleton Matthews looked stunning in a pale blue knee-length Alessandra Rich custom dress. Fitted at the waist and with a pleated skirt, the dress skimmed over the merest hint of a baby bump.  She accessorized with a fascinator in the same shade of blue, and towering stiletto heels with an ankle strap for the ceremony held in the Chapel Royal at St James's Palace.

Beaming Catherine, Duchess of Cambridge in an Alexander McQueen dress, teamed the ensemble with a very striking Jane Taylor hat with a wide cream band trimmed with white flowers and accessorized with new pearl cluster earrings, gazes lovingly at sleeping Prince Louis for his christening service at Chapel Royal at St James's Palace, London

Catherine, Duchess of Cambridge beaming as she cradled Prince Louis in her arms as she carried him home following his christening on Monday afternoon, July 9, 2018

Catherine, Duchess of Cambridge beamed as she cradled the sleeping Prince Louis, and was greeted by the Archbishop of Canterbury outside Chapel Royal at St James's Palace, London

Britain's Catherine, Duchess of Cambridge holds Britain's Prince Louis of Cambridge on their arrival for his christening service at the Chapel Royal, St James's Palace, London on July 9, 2018.

Pregnant Pippa Middleton Matthews wears a baby blue hat to match her custom Alessandra Rich dress as she arrives at St James's Palace for the christening of her nephew

Prince William held hands with Prince George, was dressed in a white Peter Pan collar Amaia's Daniel shirt and his signature shorts and Princess Charlotte, was adorable in a patterned blue dress as the family arrived for the service at the Chapel Royal at St Jame's Palace.

Meghan, Duchess of Sussex opted for an olive green Ralph Lauren shift dress and a coordinating milliner Stephen Jones hat. Her fitted dress featured a boat neckline and was belted around the waist. She accessorized with matching suede court shoes, along with a coordinating clutch bag, while clutching a pair of green leather gloves, as she joined husband Prince Harry, Duke of Sussex at baby Prince Louis' christening.

Catherine Duchess of Cambridge speaks to Archbishop of Canterbury Justin Welby as she arrives carrying Prince Louis for his christening service at the Chapel Royal, St James's Palace on July 09, 2018 in London, England.

Princess Charlotte emerged from the chapel holding the large order of service under her arm, who was adorable in a patterned blue dress.

Sleeping Prince Louis of Cambridge carries by her mother as they arrive for his christening service at St James's Palace on July 09, 2018 in London, England.

Catherine, Duchess of Cambridge wore Alexander McQueen white dress, which features V-neckline and little puff sleeves, teamed the ensemble with a very striking Jane Taylor hat and accessorized with new pearl cluster earrings, beamed as she cradled the sleeping baby Prince Louis in her arms arrived at his christening service at St James's Palace