"[Being a parent] is lonely at times. You do feel quite isolated," the 35-year-old Duchess of Cambridge admitted during a royal outing at a London school on Thursday, April 20.
While speaking with two new moms to babies, Kate added, "So many other mothers are going through exactly what you're going through. But it's being brave enough, like you obviously were, to reach out [for guidance]."
Kate also sat down with a young student who confessed to having a lack of confidence at times. "I've not really had a problem I've needed to talk to someone about, but meeting you is a new thing. I don't really know how to speak to someone so high. I'm quite shy," he told the mom-of-two.
"I'm shy as well, so don't worry," Kate sweetly replied, according to the Daily Mail.
Kate, Princess Charlotte, Prince George, and Prince William. (Photo Credit: Getty Images)
Kate's candid confession comes just days after her brother-in-law Prince Harry similarly opened up about his mental health battles in the wake of his mother Princess Diana's 1997 death.
"I didn't know what was wrong with me. [I was] very close to a complete breakdown on numerous occasions," he said, adding Diana's passing left him in "total chaos" for several years.
Check out the gallery to see Kate's cutest photos with kids Prince George and Princess Charlotte!