He has already thrilled his fans by collaborating with the likes of Taylor Swift and Justin Bieber, and now Ed Sheeran is partnering with the Duke of Sussex.
Prince Harry has posted a video on his official royal Instagram account appearing to tease a project with the music star, who is seen showing up on his doorstep.
The pair shake hands after the doorbell sounds a cheery rendition of God Save The Queen, and Harry jokes that seeing the Shape Of You singer is like "looking in the mirror".
The short clip fades to black as Sheeran enters the property, along with the text: "Tomorrow. 10th October."
There is also a #WMHD hashtag in the caption, which suggests the duo have been working on something to mark World Mental Health Day.
It is held on the same day every year to raise awareness, with the World Federation for Mental Health deciding to make preventing suicide its main focus for 2019.
Around 6,000 people across the UK and Ireland take their own lives each year, according to the Samaritans, with tens of thousands more attempting suicide.
Raising awareness of mental health has been a key target for the Duke and Duchess of Sussex and their Cambridge counterparts, who joined forces to narrate a TV advert that aired earlier this week.
The short film, which was seen by millions of people, was created to launch a joint campaign by the NHS and Public Health England called Every Mind Matters.
Anyone feeling emotionally distressed or suicidal can call Samaritans for help on 116 123 or email email@example.com in the UK. In the US, call the Samaritans branch in your area or 1 (800) 273-TALK.