On Monday July 9 Britain's Prince William and Kate Middleton christened their third child, Prince Louis of Cambridge, at St James's Palace in London.

In keeping with tradition, Prince Louis was dressed in the same beautiful christening gown that his brother and sister were christened in and is reported to be a replica of the robe made for Queen Victoria's eldest daughter in 1841.

On Monday, July 9th, Britain's Prince William and Kate Middleton christened their third child, Prince Louis of Cambridge, at the Chapel Royal in London.
The Duke and Duchess of Cambridge with their three children

Those attending the service included Prince Harry and his wife Meghan Markle; Kate's sister Pippa and her husband James Matthews as well as Charles, Prince of Wales and Camilla, Duchess of Cornwall. 

Click through the gallery above to see all the fashionable looks of the day.

While the men wore navy blue suits and blue ties, the ladies dressed to impress in some stunning ensembles.

If you're looking for a summer trend, it seems that the Royals are very into a monochromatic style...

Kate Middleton and Louis
Kate Middleton wore Alexander McQueen to the ceremony

Kate wore a white Alexander McQueen dress with beautiful shoulder detailing to the ceremony. She accessorised the outfit with nude heels, pearl earrings and a white floral headpiece.

Meghan and Harry
Meghan Markle wore an olive green Ralph Lauren dress for the occasion

Meghan wore an olive green Ralph Lauren dress for the occasion with a matching green hat by Stephen Jones and green shoes, gloves and clutch to boot.

Pippa and her husband
Pippa wore a baby blue Alessandra Rich dress with matching shoes, hat and clutch

Pippa dressed herself and her bump in a custom Alessandra Rich design and accessorised with matching blue shoes, hat and clutch.

Prince Charles, Camilla
Camilla wore a white dress from Fiona Clarke on the day

Camilla, Duchess of Cornwall, wore a white dress by Fiona Clare and a hat from Lock and Company.