Like many parents, Prince William and Kate struggled to help their young son Prince George improve his sleeping pattern when he was a baby. The father of two made the revelation during an engagement on Monday (May 16).
William admitted that George "never slept" as a baby and that he wished he had an app called Baby Buddy, which offers parents advice and support they might otherwise not seek help for.
The app was developed by the charity Best Beginnings, which ensures that children get the best possible start in life.
The charity is one of seven that is involved in the Heads Together campaign – an ambitious project launched by Prince William, his wife Kate and Prince Harry. Its aim is to end stigma surrounding mental health.
The royals toured the different charity display stands at the Queen Elizabeth Olympic Park on Monday, and chatted to different volunteers, beneficiaries and campaigners along the way.
William also revealed his secret to calming George and Charlotte when they cried – running the tap as the sound of water soothed them. The Prince added that his daughter wasn't "much of a crier" but George was as a baby.
During the engagement William, Kate and Harry also revealed what makes them happy by writing down their answers on pieces of card. William said that his children are his greatest pleasure, while Kate admitted that going for a walk lifted her spirits. Harry added that making people smile made him happy.
The royals launched the Heads Together campaign to coincide with the UK's Mental Health Awareness Week.