It's a boy! Duchess Kate Middleton gives birth to the 3rd royal baby. Here's what we know.

The new prince is fifth in the line of succession to the throne.

On Monday, April 23, Kate Middleton, the Duchess of Cambridge, gave birth to a son, weighing 8 pounds, 7 ounces.

The announcement was posted on the official Kensington Palace Twitter account, which noted that Prince William was on-site for the birth of the couple's third child. The new baby will join siblings Prince George and Princess Charlotte, who are 4 and 2 years old, respectively.

As is tradition, a birth notice was posted in the court in front of the palace, where it'll stay for 24 hours before being sent to the Privy Council Office for official recording.

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If anyone grasps the importance of mental health, it's the royal family.

Princes Harry and William, as well as Kate Middleton, the Duchess of Cambridge, have made it their mission to bring the critical issue to the public's attention.

In 2016, they teamed up with mental health charity Heads Together and released a public service announcement about why it's so important to discuss mental health. Since then, they've made a number of public appearances in support of the cause. Harry opened up about his own mental health struggles, and the brothers filmed themselves talking about what it was like losing their mother at such a young age. They even got together with Lady Gaga to help raise awareness.

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Reflecting golden hues reminiscent of a different time, newly released vintage photos of Princess Diana have sparked feelings of nostalgia and bittersweet smiles across the globe.

The previously private pics, just shared by Princes William and Harry, show the unbreakable everlasting bond between a mother and her children.

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The royal family's charming PSA on mental health is a must-watch.

'Mental health is just as important as physical health.'

If you thought President Obama meeting Prince George in his bathrobe was peak royal family cuteness, I have news for you.

Photo by Nicky J. Sims/Getty Images for Royal Foundation.

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