As a part of the Royal Foundation's 'Heads Together' campaign, the Duke of Cambridge highlighted the importance of people speaking out about their mental health in a video call with pop star Lady Gaga on Tuesday.
The pair chatted about how speaking freely on mental health problems can help shatter the stigma around them.
"It's time that everyone speaks up and really feels very normal about mental health, it's the same as physical health," William said.
"Everybody has mental health and we shouldn't be ashamed of it and just having a conversation with a friend or family member can really make such a difference."
Lady Gaga told the future king that her decision to reveal she suffered from post-traumatic stress disorder after she was raped at the age of 19 has changed her life.
"There is a lot of shame attached to mental illness, you feel like something is wrong with you... We have to make the strongest, most relentless attempt we can to normalise mental health issues," she said.
The release of a film of William's video chat with Lady Gaga on the Royal Family's Facebook page on Tuesday comes a day after his brother Harry took part in a podcast with 'The Daily Telegraph' in which he spoke candidly about how the death of his mother, Princess Diana, when he was 12 deeply affected him.
The two princes, along with the Duchess of Cambridge, are promoting the Heads Together mental health campaign as the annual London Marathon's charity of 2017.
Updated Date: Apr 19, 2017 18:27 PM