The singer began busking for the Big Issue on the steps of the Royal Concert Hall at 12.30pm. He is set to perform in Edinburgh tomorrow.
His popular track Let Her Go was used in Budweiser's Superbowl advert and has already received over half a billion views on YouTube.
Watch Passenger perform Let Her Go in this video by Colin Mearns here -
If you are viewing this article on the HeraldScotland mobile site or the app then you will need to visit the desktop site to access the video.