The Duchess of Cambridge Kate Middleton' turns 37

To celebrate the British royal's birthday, here is a look back at her 2018

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  The Duchess of Cambridge leaves St Mary Magdalene's church after the Royal Family's Christmas Day service. Reuters

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  On Christmas Day with with Prince William, Meghan, Duchess of Sussex and Prince Harry. EPA

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  Paying tribute to Leicester City Football Club's owner Aiyawatt Srivaddhanaprabha with Prince William in November. AP

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  A family photo to celebrate Prince Charles' 70th Birthday on November 14, 2018. Clarence House /Getty Images

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  With Prince William at the Royal British Legion Festival of Remembrance to commemorate all those who have lost their lives in conflicts and mark 100 years since the end of the First World War, at the Royal Albert Hall, London in November. Reuters

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  Looking through a stereograph as she officially opens the new photography centre at the Victoria and Albert (V&A) Museum in London in October. AFP

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  A family portrait to mark the christening of Prince Louis at Clarence House. Seated, left to right: Prince George, Prince William, Prince Louis, the Duchess of Cambridge and Princess Charlotte. Standing, left to right: Prince Harry, Megan, the Duchess of Sussex; Camilla, the Duchess of Cornwall; Prince Charles, Prince of Wales; Carole Middleton, Michael Middleton, Pippa Matthews, James Matthews and James Middleton. AP

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  With Prince Louis, following his July Christening in London. AP

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  Arriving at the Wimbledon Men's Singles final, wearing a yellow Dolce & Gabbana dress. Getty Images

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  Watching tennis with Meghan Markle at Wimbledon in July. Getty Images

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  Taking part in the Trooping the Colour with Camilla, Duchess of Cornwall in June. Reuters.

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  Arriving at the wedding of Prince Harry and Meghan Markle with Princess Charlotte in May. AFP

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  Leaving the Lindo Wing at St Mary's Hospital with newborn Prince Louis on April 23. AFP

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  With Prince Harry and Meghan Markle at the first annual Royal Foundation Forum in February. The Making a Difference Together-themed event showcased programmes run or initiated by The Royal Foundation. Getty Images

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  Arriving at the EE British Academy Film Awards (BAFTA) held at Royal Albert Hall. The duchess wore a bottle green Jenny Packham dress to the awards ceremony. Getty Images

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  In Oslo, Norway, with Crown Princess Mette-Marit of Norway, Crown Prince Haakon, and Prince William, during their visit to Sweden and Norway in February 2018. Getty Images

The Duchess of Cambridge is celebrating her 37th birthday today (January 9).

According to The Daily Mail, the royal is enjoying "low key" celebrations with her three children, Prince George, 5, Princess Charlotte, 3, and Prince Louis, eight months.

Kensington Royal, the official Instagram account of the The Duke and Duchess of Cambridge and The Duke and Duchess of Sussex, posted an image of a smiling Kate Middleton, taken in Cyprus in December, with the caption: "Thank you everyone for all your lovely messages on The Duchess of Cambridge’s birthday!"

Aside from celebrations, Prince William visited London's Air Ambulance on Wednesday, January 9, where he to met first responders delivering life-saving treatment across London.

He was at the official visit for just one hour, thought to have rushed away to celebrate the Duchess of Cambridge's birthday with their three children.

Following her birthday, Middleton will be preparing for her first royal engagement of the year, which is scheduled for January 15, with a visit to King Henry's Walk Community Garden in London to learn about local gardening and food growing.

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Read more:

Five things we learnt from Meghan Markle's new official royal website

Britain's royals release their Christmas cards — and they couldn't be more different

Duel of the Duchesses: are Kate Middleton and Meghan Markle friends?

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