Adorable new Princess Charlotte photos mark royal's 4th birthday

Britain's Queen Elizabeth II waves to the public as she leaves after attending the Easter Mattins Service at St. George's Chapel, at Windsor Castle in England Sunday, April 21, 2019. (AP Photo/Kirsty Wigglesworth, pool)

Britain's Kate, The Duchess of Cambridge curtsies as Britain's Queen Elizabeth II arrives to attend the Easter Mattins Service at St. George's Chapel, at Windsor Castle in England Sunday, April 21, 2019. (AP Photo/Kirsty Wigglesworth, pool)

Britain's Kate, The Duchess of Cambridge curtsies as Britain's Queen Elizabeth II arrives to attend the Easter Mattins Service at St. George's Chapel, at Windsor Castle in England Sunday, April 21, 2019. (AP Photo/Kirsty Wigglesworth, pool)

Members of Britain's Royal family watch as Britain's Queen Elizabeth II arrives to attend the Easter Mattins Service at St. George's Chapel, at Windsor Castle in England Sunday, April 21, 2019. (AP Photo/Kirsty Wigglesworth, pool)

Britain's Prince Harry arrives to attend the Easter Mattins Service at St. George's Chapel, at Windsor Castle in England Sunday, April 21, 2019. (AP Photo/Kirsty Wigglesworth, pool)

Britain's Kate, The Duchess of Cambridge curtsies as Britain's Queen Elizabeth II arrives to attend the Easter Mattins Service at St. George's Chapel, at Windsor Castle in England Sunday, April 21, 2019. (AP Photo/Kirsty Wigglesworth, pool)

Britain's Prince William and Kate, The Duchess of Cambridge arrive to attend the Easter Mattins Service at St. George's Chapel, at Windsor Castle in England Sunday, April 21, 2019. (AP Photo/Kirsty Wigglesworth, pool)

Britain's Kate, The Duchess of Cambridge, left, smiles with Zara Tindall as they arrive to attend the Easter Mattins Service at St. George's Chapel, at Windsor Castle in England Sunday, April 21, 2019. (AP Photo/Kirsty Wigglesworth, pool)

Members of Britain's Royal family watch as Britain's Queen Elizabeth II arrives to attend the Easter Mattins Service at St. George's Chapel, at Windsor Castle in England Sunday, April 21, 2019. (AP Photo/Kirsty Wigglesworth, pool)

By Michelle Ewing

LONDON — Happy birthday, Princess Charlotte!

The middle child of Britain's Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, turned 4 on Thursday.

Kensington Palace tweeted new photos of the adorable royal Wednesday. The duchess, formerly known as Kate Middleton, snapped the pictures last month at the palace in London and the family's home in Norfolk.

>> See the photos here

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The post came just days after Charlotte's baby brother, Prince Louis, celebrated his first birthday and her great-grandmother, Queen Elizabeth II, marked her 93rd. Charlotte's uncle, Prince Harry, Duke of Sussex, and his wife, Duchess Meghan, formerly known as Meghan Markle, also are expecting a baby in the coming days.