Princess Charlotte's wave upstages the new royal baby

Cambridge leaves the Lindo Wing of St Mary's Hospital after Catherine Duchess of Cambridge gave birth to a baby boy

Princess Charlotte's wave upstages the new royal baby

'It was a attractive day in London and the streets were full of fans who couldn't believe they saw Charlotte and George as well as the much-awaited new royal bub!' The blue floral dress that two-year-old Charlotte wore to the hospital to meet her baby brother on Monday has sold out online, according to the brand Little Alice London's website.

White Kate dazzled in a bright spring dress, fans were dressed up in insane outfits depicting the Union Flag.

Not long after Princess Charlotte was hamming it up for the crowd of reporters and well-wishers, her older brother Prince George put his arm around his younger sister as if to comfort her.

She may only be 2 years old, but she's completely mastered her royal waving technique and is definitely living up to her princess title.

Click an image below for larger version.

Princess Charlotte sure knows how to charm an audience.

Prince William joked with press outside that three kids meant "thrice the worry now", holding up three fingers with a smile.

She appeared out the front with her husband and new bub a mere seven hours after giving birth.

Hundreds of fans took to Twitter to gush over the cuteness exhibited by the princess, moments before she disappeared inside to meet her mother Kate and the newborn.

Unlike with first-born baby George in 2013, Prince William secured the capsule in the couple's Range Rover with the confidence of a dad who has done it many times before, smiling at photographers.

Camera IconPrince Charles and Princess Diana take home their son, Prince William, on June 22 in 1982.

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