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Princes Charlotte

Samir Hussein/WireImage

Princess Charlotte is loving her role as a big sister and she's about to become a big cousin!

Last April, Prince William and Kate Middleton welcomed third child together, Prince Louis. Lottie, as her parents reportedly call her, and her two brothers have been inseparable since.

Furthermore, the birth of the couple's third child came almost exactly three years after the royals welcomed Charlotte in May 2015. Basically, it's been a party of five for the famous family.

Now, the 3-year-old cutie is going to be an older cousin to Prince Harry and Meghan Markle's baby. The Duke and Duchess of Sussex are ready to welcome their first child together in the next month or so, which means Princess Charlotte might share a birthday month with her uncle's newborn.

To celebrate the toddler's upcoming role as a big cousin to the former Suits actress and her husband's baby, let's take a trip down memory lane and look back at Charlotte's baby album!

From adorable moments with her royal parents to candid snaps of of little Lottie, the toddler is just too cute for words. Keep scrolling through our gallery below if you're having some serious royal baby fever!

Princess Charlotte

Courtesy of the Duchess of Cambridge

Princes Charlotte

Samir Hussein/Samir Hussein/WireImage

Princes Charlotte

Samir Hussein/WireImage

Princes Charlotte

Chris Jackson - Pool/Getty Images

Princes Charlotte

Samir Hussein/WireImage

Princess Charlotte, Official Photo

HRH The Duchess of Cambridge

Princess Charlotte, Official Photo

HRH The Duchess of Cambridge

Princess Charlotte, Official Photo

HRH The Duchess of Cambridge

Princess Charlotte, Official Photo

HRH The Duchess of Cambridge

Kate Middleton, Prince William, Prince George, Princess Charlotte

JOHN STILLWELL/AFP/Getty Images

Kate Middleton, Prince William, Prince George, Princess Charlotte

JOHN STILLWELL/AFP/Getty Images

Kate Middleton, Prince William, Prince George, Princess Charlotte

JOHN STILLWELL/AFP/Getty Images

Kate Middleton, Prince William, Prince George, Princess Charlotte, Christmas Card, 2015

Chris Jelf /Kensington Palace via Getty Images

Princess Charlotte

Press Association via AP Images/HRH The Duchess of Cambridge

Princess Charlotte

Press Association via AP Images/HRH The Duchess of Cambridge

 Catherine, Duchess of Cambridge, Princess Charlotte, Christening

Chris Jackson - WPA Pool/Getty Images

Princess Charlotte, Christening

Chris Jackson - WPA Pool / Getty Images

Kate Middleton, Catherine, Duchess of Cambridge, Royal Baby

Chris Jackson/Getty Images

Kate Middleton, Catherine, Duchess of Cambridge, Royal Baby, Prince William

Chris Jackson/Getty Images

Kate Middleton, Catherine, Duchess of Cambridge, Royal Baby, Prince William

John Stillwell/PA Wire

Kate Middleton, Catherine, Duchess of Cambridge, Princess Charlotte, Prince William

John Stillwell - WPA Pool/Getty Images

Kate Middleton, Catherine, Duchess of Cambridge, Princess Charlotte, Prince William

Ian Gavan/Getty Images

Kate Middleton, Catherine, Duchess of Cambridge, Royal Baby, Prince William

AP Photo/Matt Dunham

Kate Middleton, Catherine, Duchess of Cambridge, Royal Baby, Prince William

Chris Jackson/Getty Images

Kate Middleton, Catherine, Duchess of Cambridge, Royal Baby, Prince William

AP Photo/Alastair Grant

Kate Middleton, Catherine, Duchess of Cambridge, Royal Baby, Prince William

AP Photo/Alastair Grant

We can't wait to see the 3-year-old royal take pics with her cousin, the Duke and Duchess of Sussex's baby.

Don't miss E! News every Tuesday to Saturday at 6pm.

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