Duchess Kate stuns in Alexander McQueen for Prince Louis' christening

She's back! After a month-long hiatus, Duchess Kate stepped out for her newborn son's christening looking as stunning as ever in Alexander McQueen.

The proud mom was seen walking into St. James' Palace in London wearing a white dress with structured shoulder detailing by her favorite British designer. She paired the dress with a Jane Taylor hat and a dazzling pair of pearl earrings.

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Prince Louis' christening
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Prince Louis' christening
LONDON, ENGLAND - JULY 09: Princess Charlotte and Prince George hold the hands of their father, Prince William, Duke of Cambridge, as they arrive at the Chapel Royal, St James's Palace, London for the christening of their brother, Prince Louis, who is being carried by their mother, Catherine, Duchess of Cambridge on July 09, 2018 in London, England. (Photo by Dominic Lipinski - WPA Pool/Getty Images)
The Duke and Duchess of Cambridge with their children Prince George, Princess Charlotte and Prince Louis after Prince Louis's christening at the Chapel Royal, St James's Palace, London.
The Duke and Duchess of Cambridge with their children Prince George, Princess Charlotte and Prince Louis after Prince Louis's christening at the Chapel Royal, St James's Palace, London.
The Duke of Cambridge with Prince George and Princess Charlotte after Prince Louis's christening at the Chapel Royal, St James's Palace, London.
Britain's Catherine, the Duchess of Cambridge, carries Prince Louis as they arrive for his christening service at the Chapel Royal, St James's Palace, London, Britain, July 9, 2018. Dominic Lipinski/Pool via REUTERS
Britain's Catherine, the Duchess of Cambridge, carries Prince Louis as they arrive for his christening service at the Chapel Royal, St James's Palace, London, Britain, July 9, 2018. Dominic Lipinski/Pool via REUTERS
Britain's Catherine, the Duchess of Cambridge, carries Prince Louis as they arrive for his christening service at the Chapel Royal, St James's Palace, London, Britain, July 9, 2018. Dominic Lipinski/Pool via REUTERS
LONDON, ENGLAND - JULY 09: Catherine, Duchess of Cambridge carries Prince Louis as they arrive for his christening service at St James's Palace on July 09, 2018 in London, England. (Photo by Dominic Lipinski - WPA Pool/Getty Images)
The Duke and Duchess of Sussex depart after attending the christening of Prince Louis at the Chapel Royal, St James's Palace, London.
The Duke and Duchess of Cambridge with their children Prince George, Princess Charlotte and Prince Louis after Prince Louis's christening at the Chapel Royal, St James's Palace, London.
Pippa Middleton and her husband James Matthews arriving for the christening of Prince Louis, the youngest son of the Duke and Duchess of Cambridge at the Chapel Royal, St James's Palace, London.
The Prince of Wales and the Duchess of Cornwall arriving for the christening of Prince Louis, the youngest son of the Duke and Duchess of Cambridge at the Chapel Royal, St James's Palace, London.
Britain's Prince Harry and Meghan, the Duchess of Sussex, leave the chapel after the christening of Prince Louis at the Chapel Royal, St James's Palace, London, Britain, July 9, 2018. Dominic Lipinski/Pool via REUTERS
James Matthews arrives for the christening of Prince Louis, the youngest son of the Duke and Duchess of Cambridge at the Chapel Royal, St James's Palace, London, Britain, July 9, 2018. Dominic Lipinski/Pool via REUTERS
Pippa Middleton and her husband James Matthews, arrive for the christening of Prince Louis, the youngest son of the Duke and Duchess of Cambridge at the Chapel Royal, St James's Palace, London, Britain, July 9, 2018. Dominic Lipinski/Pool via REUTERS
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As for her hair and makeup, Kate styled her tresses in a low chignon bun while rocking a daytime-appropriate smoky eyeshadow on her lids, a nude color on her lips and some blush on her cheeks. 

The 36-year-old royal has worn similar Alexander McQueen looks in past years for the christenings of her other children Prince George and Princess Charlotte. For George's baptism in 2013, she wore a ruffled yellow look and for Charlotte's in 2015 she donned a white coat dress. 

See photos from Charlotte's 2015 christening:

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Princess Charlotte's christening
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Princess Charlotte's christening

Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge, Princess Charlotte of Cambridge and Prince George of Cambridge arrive at the Church of St Mary Magdalene on the Sandringham Estate for the Christening of Princess Charlotte on July 5, 2015 in King's Lynn, England.

Photo: Matt Dunham - WPA Pool /Getty Images

Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge, Princess Charlotte of Cambridge and Prince George of Cambridge arrive at the Church of St Mary Magdalene on the Sandringham Estate for the Christening of Princess Charlotte of Cambridge on July 5, 2015 in King's Lynn, England.

Photo: Chris Jackson - WPA Pool/Getty Images

Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge arrive at the Church of St Mary Magdalene.

Photo: Chris Jackson - WPA Pool/Getty Images

Prince William chats with George as they arrive at the Church of St Mary Magdalene on the Sandringham Estate for the Christening of Princess Charlotte.

Photo: Chris Jackson/Getty Images

Prince George holds his dad's hand before the christening of his little sister, but seems quite preoccupied with the crowd!

Photo: Chris Jackson/Getty Images

Beautiful baby Charlotte looks up at her mom Kate as she is pushed in her silver cross pram after her christening.

Photo: Chris Jackson - WPA Pool/Getty Images

Kate holds Charlotte as she, William and George talk to Queen Elizabeth, Prince Phillip and Camilla, Duchess of Cornwall at the Church of St Mary Magdalene on the Sandringham Estate after the christening of Princess Charlotte.

Photo: by Chris Jackson - WPA Pool/Getty Images

Prince George of Cambridge chats with his great-grandmother Queen Elizabeth II outside the Church of St Mary Magdalene.

Photo: Chris Jackson/Getty Images

Kate and the queen smily adoringly at little Charlotte as they leave the Church of St Mary Magdalene on the Sandringham Estate.

Photo: Chris Jackson/Getty Images

The Cambridge family smiles as they walk past crowds outside of Charlotte's christening.

Photo: Mary Turner - WPA Pool/Getty Images

Prince William and Prince George of Cambridge walk past crowds as they leave the Church of St Mary Magdalene.

Photo: Mary Turner - WPA Pool/Getty Images

Camilla, Duchess of Cornwall and Carole Middleton leave the Church of St Mary Magdalene on the Sandringham Estate for the Christening of Princess Charlotte.

Photo: Chris Jackson/Getty Images

George checks on his little sister after her christening is over. 

Photo: Chris Jackson - WPA Pool/Getty Images

Camilla, Duchess of Cornwall arrives at the Church of St Mary Magdalene on the Sandringham Estate for the Christening of Princess Charlotte.

Photo: Chris Jackson - WPA Pool/Getty Images

Pictured July 23, 1986: Prince William with his cousin Laura Fellowes at the wedding of the Duke and Duchess of York.  The Duke and Duchess of Cambridge have chosen Miss Fellowes as one of five godparents for their daughter Princess Charlotte.

Photo: PA Wire

Pictured July 7, 2005: The Duke of Cambridge with Thomas van Straubenzee. The Duke and Duchess of Cambridge have chosen Mr van Straubenzee as one of five godparents for their daughter Princess Charlotte.

Photo: Robin Nunn/PA Wire

Pictured September 14, 2013: James Meade. The Duke and Duchess of Cambridge have chosen Mr Meade as one of five godparents for their daughter Princess Charlotte.

Photo: Ian West/PA Wire

Royalist Terry Hutt queues outside the Sandringham Estate and the Church of St Mary Magdalene as the crowd waits for the Christening of Princess Charlotte of Cambridge on July 5, 2015 in King's Lynn, England.

Photo: Chris Jackson/Getty Images

The church of St Mary Magdalene on the Sandringham Estate in Norfolk.

Photo: Joe Giddens/PA Wire

Inside the church of St Mary Magdalene on the Sandringham Estate in Norfolk.

Photo: Joe Giddens/PA Wire

A Crown Jeweller from the Tower of London positions the Lily Font (left) and silver Ewer being used at Princess Charlotte's christening while displayed at Buckingham Palace, London.

Photo: Anthony Devlin/PA Wire

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Kate and William's immediate family (with the exception of Queen Elizabeth and Prince Philip) attended Louis' christening on Monday. The Duke and Duchess of Sussex walked in shortly after Kate and Wills, with the duchess looking gorgeous in Ralph Lauren. Kate's little sister Pippa Middleton looked beautiful in a blue, bespoke Alessandra Rich number.

For more on the royal christening, watch the video above. 

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