The unlikely pair are coming together to tackle mental health
Brtiain's Prince William and US singer Lady Gaga have come together to raise awareness of mental health.
They are encouraging more people to have an open conversation on the topic as part of a Heads Together #OKtosay film series.
This film shows a conversation between the pair over FaceTime from their homes in London and Los Angeles.
In the clip, they discuss powerful films that have been released - showing people from all walks of life discussing their mental health challenges.
They discussed how opening up and having conversations about mental health was vital to shatter stigma that still surrounds these issues.
"I am a very big fan of what you've done with Heads Together and #OKto say...it reminded me how much my mental health changing change my life", Lady Gaga said.
Prince William replied: "Harry, Catherine and I really felt this was such an important area that throughout all our charitable work - whether it was the veterans, homelessness, addiction - most of it seemed to stem back to mental health issues."
Last year, Lady Gaga released an open letter through her Born This Way Foundation revealing that she lives with Post Traumatic Stress Disorder.
Prince William says he was hugely impressed with the openness in the letter, and asked Lady Gaga to get involved with his Heads Together campaign.
The singer said: "In my life I go 'Oh my goodness, look at all these beautiful, wonderful things that I have and I should be so happy'. But you can't help it if - in the morning when you wake up - you are so tired, you are so sad, you are so full of anxiety and the shakes that you can barely think.
"But it was like saying 'This is a part of me, and that's OK'".
Lady Gaga said she felt people with mental health challenges were "not hiding anymore", with Prince William adding that it is time "to feel very normal about mental health - it's the same as physical health" and that good conversations can save lives.
Prince William said: "Just having a conversation with a friend or family member can really make such a difference".
Lady Gaga said: "Even though it was hard, it was the best thing that could come out of my mental illness - was to share it with other people.
"And let our generation, as well as other generations, know that if you are feeling not well in your mind that you're not alone.
"And that people that you think would never have a problem, do".
Annyone affected by issues raised in this article can find information here, or call 1850-24-1850