Lady Kitty Spencer enjoys night out at Mayfair's LouLou's

• Lady Kitty Spencer appeared in high spirits as she left the Mayfair venue
• READ MORE: Sophie Duchess of Edinburgh beams as she leaves private members club with friends in Mayfair

Princess Diana’s niece Lady Kitty Spencer looked radiant as she enjoyed a night out in Mayfair with close friend Emma Weymouth on Tuesday.

Marking her first evening out in the public eye since welcoming her first child, Kitty, 33, who is the oldest child of Diana’s brother, Earl Spencer, was all smiles as she left private members club, LouLou’s.

The 33-year-old revealed on Mother’s Day that she had welcomed her first child with her husband Michael Lewis.

Kitty is a first cousin or Princes William and Harry, meaning the new baby will be second cousins to Princes George, Louis, Archie and Princesses Charlotte and Lilibet.

Leaving the exclusive Mayfair venue hand in hand with the Marchioness of Bath, 38, Kitty looked elegant in a tailored navy pinstripe suit and an elegant pair of nude suede heels.

Lady Kitty Spencer (right) put on an elegant display as she left private members club LouLou’s alongside her close friend Emma Weymouth (left)

Kitty wore her blonde tresses loose and opted for a simple makeup look for the occasion, complete with a touch of bronze eyeshadow.

Meanwhile, socialite Emma put on a glamorous display in a low-cut belted leopard print dress.

The pair appeared in high spirits as they left the glitzy venue – which also hosted Sophie, Duchess of Edinburgh on Tuesday evening.

It comes after Lady Kitty Spencer revealed she welcomed her first child with her husband Michael Lewis on Instagram.

Sharing a stunning picture on the beach holding the baby – whose name and gender she did not reveal – Kitty wrote: ‘It’s the joy of my life to be your mummy, little one. I love you unconditionally. Happy Mother’s Day to those who celebrate today’.

Kitty opted for a white swimsuit in one snap, as she walked on the beach with a newborn.

In another snap, she wore her hair down and showed just the baby’s hand.

Her comments were quickly flooded with support, including by her sister Amelia Spencer, who wrote: ‘The most perfect angel in the world’.

In her first night out in the public eye since giving birth to her first child, Kitty walked hand in hand with Emma in Mayfair

Her half-brother, Samuel Aitken, added a heart emoji, while society pal Emma Weymouth added a series of heart eye emojis.

Once a common fixture of the London society scene, Kitty has had a hiatus from the public eye in recent months, she was last snapped enjoying a girl’s night out in London in October.

The 33-year-old, who works as a model for Dolce & Gabanna, tied the knot to South African multi-millionaire Michael Lewis, 65, three years ago.

Lady Kitty, then 30, wed the multi-millionaire Michael Lewis at the Villa Aldobrandini in Frascati, a stunning country mansion with views out towards Rome, on July 24, 2021.

Having delayed their wedding for two years due to the pandemic, the celebrations stretched across three days and were attended by close friends including the pop star Pixie Lott and the Marchioness of Bath.

Kitty looked radiant in a tailored navy pinstripe suit, which she matched with a pair of nude suede heeled pumps

Yet if there was intrigue about the age gap between Diana’s niece and her 63-year- old groom, a still more pressing question was this: where was her father, Diana’s brother Charles.

The 59-year-old Earl was nowhere to be seen amid speculation that his relationship with his daughter had gone downhill in the wake of his third marriage.

At the time, an insider told MailOnline that the Earl’s health was unlikely to have accounted for his absence. Rather it was likely to have been the result of a changing family dynamic.

‘The four children are all close to their mother Victoria and get on well with their step-siblings, and their Spencer aunts and have forged their own relationships with one another without needing Charles to bind them together,’ said the insider.

A source had previously told MailOnline how Earl Spencer and his eldest daughter have drifted apart over time, saying: ‘Kitty and Charles were very close when she was growing up, but their relationship has cooled and been more distant since his marriage to his third wife Karen in 2011.

‘Charles recently suffered an injury and perhaps that will be the reason for him not travelling, but it is just easier for everyone that he is not there.’

Kitty, 33, who is the oldest child of Diana’s brother Earl Charles Spencer took to Instagram to mark her first Mothers’ Day

The Earl had been struggling with a painful shoulder injury which he revealed was affecting his freedom of movement.

So Kitty was given away not by her father but by her brother Louis, Viscount Althorp, 29, and half-brother Samuel Aitken, 20, whose father is South African businessman Jonathan Aitken.

Her twin sisters Lady Amelia, 31, and Lady Eliza Spencer, 31, were also there to watch Kitty and Michael exchange vows between floral arches.

The bride, a Global Brand Ambassador for Dolce & Gabbana, wore five gowns by the designer over the weekend.

For her main dress, the high-neck, Victorian-inspired white lace gown featured feminine puff sleeves and a cinched waist. The design drew inspiration from her mother Victoria Lockwood’s own wedding dress with its button-down front.

Mr Lewis wore a kippah, and it is thought Lady Kitty received instruction in the Jewish faith ahead of the ceremony.

The model caught the eye of the business tycoon when they met through mutual friends in 2018 and got married in the sumptuous Italian wedding ceremony three years later.

But before she met her prince charming, Lady Kitty, made a name for herself in the fashion world, as a spokesmodel for Dolce & Gabbana, who supplied five dresses for her wedding and walked in several Fashion Weeks across the globe.

Meanwhile, Michael knows a thing or two about fashion as well, being the chairman of the Foschini Group, which owns British high street chains Whistles and Phase Eight.

The tycoon is believed to be worth £80million, with a £19million property in London and another home in his native South Africa, where his wife grew up after her Charles, the 9th Earl Spencer and his first wife, Victoria Lockwood, divorced.

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