It looks like the royal baby is taking visitors now that he's finally home at Kensington Palace with mum and dad, Kate Middleton and Prince William. One of his first guests appears to be aunt Pippa Middleton, who was spotted driving out of palace grounds today in a millennial pink coat, sweater, and sunglasses.

Sources also told Us Weekly that the Duchess of Cambridge's sister, who is reportedly pregnant with her first child, arrived this afternoon, London time.

preview for Prince William and Kate Middleton introduce public to their new baby boy

Pippa likely found out about the royal birth long before any of us did. Sources told BAZAAR.com that the proud parents notified their loved ones about the new baby's arrival before making the official announcement hours later.

Prince William, for example, personally called the Queen and Prince Philip, Prince Charles and Duchess Camilla, and Prince Harry and Meghan Markle about the news, an aide told BAZAAR.com.

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The younger Middleton sister wasn't the first relative to visit the new baby, though. Prince George and Princess Charlotte got to meet their new sibling just hours after he was born. The royal tots made an adorable arrival to the Lindo Wing of St. Mary's Hospital yesterday, where their mother gave birth. (Charlotte couldn't stop waving to her fans.)

Another addition to the Middleton family could be arriving soon. On Saturday, reports broke that Pippa is expecting her first child with husband James Matthews, whom she wed last May.

A source close to the couple told the Sunday Express that big sister Kate "could not have been more delighted" about the news. Perhaps it won't be long until we see Kate swinging by Pippa's place to meet her first niece or nephew.

From: Harper's BAZAAR US
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Erica Gonzales

Erica Gonzales is the Senior Culture Editor at ELLE.com, where she oversees coverage on TV, movies, music, books, and more. She was previously an editor at HarpersBAZAAR.com. There is a 75 percent chance she's listening to Lorde right now.