He's only three days old, but little Louis is already acting like a prince! Prince William stepped out with Prince Harry and Meghan Markle to mark Anzac Day on Wednesday, April 25, and dished on his and Kate Middleton's newborn son when asked.

When William, 35, was questioned about how their little boy is doing, he replied, "Very well, thanks," before adding that everyone is "in good form, luckily." The Duke of Cambridge even shared that Prince George and Princess Charlotte's little sibling is very well-behaved. "Sleeping’s going reasonably well so far, so he’s behaving himself which is good," William said, according to People.

The bundle of joy, who weighed 8 lbs., 7oz. at birth, joined the royal family on Monday, April 23 at 11:01 a.m. At the time, Kensington Palace shared a statement that read, "Her Royal Highness The Duchess of Cambridge was safely delivered of a son at 1101hrs. The baby weighs 8lbs 7oz. The Duke of Cambridge was present for the birth. Her Royal Highness and her child are both doing well. The Queen, The Duke of Edinburgh, The Prince of Wales, The Duchess of Cornwall, Prince Harry, and members of both families have been informed and are delighted with the news."

And now sources have revealed that the family is complete with their newest addition. "It completes them. [Kate] is one of three siblings, and it’s a good family size. Boy-girl-boy is pretty cool as well," royal biographer Ingrid Seward told People. A family friend then added, "[Parenthood] suits them really well. They are enjoying it and are very happy." We can't wait to see their first family photos!

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