There will be two more princesses at Kensington Palace! Now that Kate Middleton is roughly four months into her third pregnancy, she already found out the gender of her babies — yes, babies! Sources exclusively reveal to Life & Style that the Duchess of Cambridge is pregnant with twin girls! Watch the video below to find out Kate’s due date!

Now that Kate and her husband Prince William know the sex of their babies, they’re already making lists of possible baby names and they’re drawing from ancestors from the House of Windsor for inspiration. “They’ve drawn up a list of baby names they both like, which include Victoria, Alice, Olivia, Alexandra, and Elizabeth,” says the royals insider.

Kensington Palace announced the couple was expecting again back in September after the Duchess’ acute morning sickness, hyperemesis gravidarum, forced her to miss a public appearance. It was previously believed that William had let slip where exactly she was in her pregnancy.

After speaking at the National Mental Health and Policing conference in Oxford, England, on Sept. 5, an audience member congratulated the 35-year-old royal. He reportedly responded, “Thank you, it’s very good news. There’s not much sleep going on at the moment.” He continued by saying “it was a bit anxious to start with,” but that the duo could “start celebrating this week” — which many took to mean that Kate was approaching the 12-week mark.

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(Photo Credit: Getty Images)

Before that, the future king hinted that Kate could give birth sooner than her due date! According to Elle UK, the Prince made the admission during a trip to Spitalfields Crypt Trust, a charity that supports those dealing with homelessness and addiction in East London, on Sept. 19. “All the best with the midwifery, I may see you sooner than you think,” he told a mid-wife during his visit to the organization.

The twins will be fifth and sixth-in-line to the throne, following grandfather Prince Charles, father Prince William, older brother Prince George, and older sister Princess Charlotte — who will not be passed over thanks to a recent change in the law of succession concerning gender.