In a new video promoting their mental health campaign, Heads Together, the Duke and Duchess of Cambridge and Prince Harry spoke openly about their personal struggles, particularly parenthood and losing a loved one.
The royals were inspired to focus on mental health from their work with various groups like veterans, recovering addicts and families dealing with terminal illness.
Catherine kicked off the conversation, admitting that becoming a mom for the first time was a very jarring experience.
"Nothing can really prepare you for that. Remember the first few days with little George, you know, you have no idea really what you're doing," she said to William, harking back to the weeks following the young prince's July 2013 birth.
Like most new parents, the Cambridges relied on the help of Catherine's family, but William had to get back to work in Anglesey, Wales, over 275 miles away from the comfort of the Middleton's Berkshire home.
"It was a steep learning curve," Catherine admitted.
Talk soon turned to the Princess of Wales' death, a monumental and life-changing loss for her sons. The boys were just teenagers when Diana was killed in a 1997 car crash, and Harry admitted earlier this week that he refused to deal with losing his mother for a very long time.
"I always thought, 'What's the point of bringing up something that's only going to make you sad,'" Harry told his brother and sister-in-law in the video, which was recorded on April 19 at Kensington Palace. "'It ain't going to change it. It ain't going to bring her back.'"
Catherine commended the boys' "amazingly close relationship" with each another, and how they're using past experiences to help younger generations cope with similar losses.
"When you speak to other people's families and little kids and stuff you think, 'Wow, I don't want them to go through the same things,'" Harry shared. "With a little bit of experience you want to do everything you can to help to stop them bottling it up."
Watch the conversation below: