While she was pregnant with Prince George and Princess Charlotte, she wore tailored coats and print dresses with sky-high heels and didn't miss a step. Her maternity wardrobe is sure to impress this time around.
Here are some of her best maternity outfits.
Kate Middleton's maternity wardrobe features lots of coats.
Prince William and Kate Middleton depart with Doreen Lawrence after visiting the Stephen Lawrence Centre London on March, 27, 2015.Alistair Grant/Pool/Reuters
She's been known to wear them more than once, like this pink Mulberry coat.
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge visit Coventry University, Science and Health Building on January 16, 2018 in Coventry, England.Eamonn M. McCormack/Getty Images
The Duke and Duchess of Cambridge are seen as they welcome the President of Singapore at the Royal Garden Hotel on October 21, 2014 in London, England.Chris Jackson/Getty Images
And occasionally plants.
Kate Middleton attends the St Patrick's Day Parade at Mons Barracks on March 17, 2015 in Aldershot, England.Eddie Mulholland/WPA Pool/Getty Images
Sometimes, the coat itself is the entire look.
Kate Middleton attends a Garden Party in the grounds of Buckingham Palace hosted by Queen Elizabeth II on May 22, 2013.John Stillwell/WPA Pool/Getty Images
Other times, she wears them open over a dress.
Kate Middleton meets children and staff during a visit to Naomi House Children's Hospice on April 29, 2013 near Winchester, Hampshire, England.David Parker/WPA Pool/Getty Images
And speaking of dresses, the Duchess of Cambridge has worn lots of them with past pregnancies.
The Duchess of Cambridge visits an EACH (East Anglia Children's Hospice) Appeal Launch Event at Norfolk Showground on November 25, 2014 in Norwich, England.Paul Rogers/WPA Pool/Getty Images
Black and white prints are always a classic.
Kate Middleton is seen during her visit to Resort Studios in Cliftonville on March 11, 2015 in Margate, England.Arthur Edwards/WPA Pool/Getty Images
This patterned maternity dresses makes a bold statement.
Kate Middleton visits Cape Hill Children's Centre.Eddie Mulholland/WPA Pool/Getty Images
She's also repeated this look.
Kate Middleton visits the Reach Academy with Place2Be on January 10, 2018.Eddie Mulholland/WPA Pool/Getty Images
She wore the dress again under a powder blue raincoat on a rainy day in London.
Catherine, Duchess of Cambridge arrives at Kings College during a visit to the Maurice Wohl Clinical Neuroscience Institute on January 24, 2018 in London, England.Chris Jackson/Getty Images
Black and white polka dots are timeless.
Kate Middleton during a visit to Portsmouth.Christopher Pledger/WPA Pool/Getty Images
Her solid dresses feature subtle accessories of their own.
Kate Middleton attends the annual Place2Be School Leaders Forum at UBS London.John Phillips/WPA Pool/Getty Images
A casual wrap dress leaves plenty of room for a baby bump.
Kate Middleton arrives at Hope House addiction treatment centre in south London February 19, 2013.Stefan Wermuth/Reuters
So does an empire waistline.
Kate Middleton attends an evening reception to celebrate the work of The Art Room charity at The National Portrait Gallery on April 24, 2013 in London, England.Tim P. Whitby/WPA Pool/Getty Images
Middleton has suffered from severe morning sickness with each of her pregnancies, but she doesn't let it slow her down.
Kate Middleton looks at the costume for the character Hagrid on display on the set used to depict Hogwart's 'Great Hall' in the Harry Potter films during the Inauguration Of Warner Bros. Studios Leavesden on April 26, 2013.Chris Jackson/WPA Pool/Getty Images
She wore athletic pants and a track jacket to say hello to the young pupils at the Wimbledon Junior Tennis Initiative.
Kate Middleton visits the Bond Primary School in Mitcham to see the work of the Wimbledon Junior Tennis Initiative (WJTI) on January 17, 2018 London, United Kingdom.Arthur Edwards/WPA Pool/Getty Images
And rocked a bright red coat to bring some much-needed joy to hospital patients.
Kate Middleton visits Great Ormond Street Hospital on January 17, 2018 in London, England.Stuart C. Wilson/Getty Images
She also advocates for mental health awareness in schools.
Kate Middleton meets children, teachers and other stakeholders as she launches a mental health programme for schools, the latest initiative from the Heads Together campaign, during her visit to Roe Green Junior School on January 23, 2018 in London, England.Jonathan Brady/WPA Pool/Getty Images
She cancels some appearances when she's not feeling up for them, but she continues her royal engagements and charity work.
The Duchess of Cambridge speaks during her visit to The Willows Primary School, Wythenshawe to launch a new school counseling program on April 23, 2013.Paul Ellis/WPA Pool/Getty Images
And looks fantastic doing it.
Kate Middleton is greeted by Chief Executive Nick Barton (L) as she arrives to attends an Autumn Gala evening in support of Action on Addiction, in London October 23, 2014.Justin Tallis/Pool/Reuters
She stuns at award shows like this year's British Academy Film Awards, where she wore a forest green dress with a diamond necklace and earrings.
Kate Middleton attends the British Academy Film Awards (BAFTA) held at Royal Albert Hall on February 18, 2018 in London, England.Chris Jackson/Getty Images
She didn't wear black in solidarity with the Time's Up movement combating sexual assault and harassment — here's why.
And continued to look fashion-forward the next day in a black-and-white Erdem dress while attending the Commonwealth Fashion Exchange.
Kate Middleton attends The Commonwealth Fashion Exchange Reception at Buckingham Palace on February 19, 2018 in London, England.WPA Pool/Getty Images
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Talia Lakritz is a Life correspondent at Business Insider covering politics and power through a visual storytelling lens. She has reported from the White House as well as military installations, mansions, and museums across the country, bringing readers inside fascinating places through immersive features.Previously, she wrote for The New York Jewish Week and SciShow Space.Talia holds a BA in English with a concentration in Creative Writing from Barnard College of Columbia University and ordination as an interfaith minister from One Spirit Learning Alliance. She hopes to one day visit all 50 states and all 14 public presidential libraries.Politics and power: