The singer took to the Main Stage at 11.55am for his debut performance at the Glasgow Green event.
In a video posted to Twitter last night the former postman called on music fans to 'set their alarms' as he prepared for his "big day".
Thousands of fans are expected to flock to the outdoor venue this weekend as Scotland's largest festival continues.
Our photographer captured the audience singing along with the Airdrie musician - can you spot yourself?
Nathan Evans on the main stage at TRNSMT at Glasgow Green Saturday. [Photograph by Gordon Terris]
Nathan Evans on the main stage at TRNSMT at Glasgow Green Saturday. [Photograph by Gordon Terris]
Nathan Evans on the main stage at TRNSMT at Glasgow Green Saturday. [Photograph by Gordon Terris]
Nathan Evans on the main stage at TRNSMT at Glasgow Green Saturday. [Photograph by Gordon Terris]
Fans watch Nathan Evans on the main stage at TRNSMT at Glasgow Green Saturday [Photograph by Gordon Terris]
Fans watch Nathan Evans on the main stage at TRNSMT at Glasgow Green Saturday [Photograph by Gordon Terris]
Fans watch Nathan Evans on the main stage at TRNSMT at Glasgow Green Saturday [Photograph by Gordon Terris]
Fans watch Nathan Evans on the main stage at TRNSMT at Glasgow Green Saturday [Photograph by Gordon Terris]
Fans watch Nathan Evans on the main stage at TRNSMT at Glasgow Green Saturday [Photograph by Gordon Terris]
Fans watch Nathan Evans on the main stage at TRNSMT at Glasgow Green Saturday [Photograph by Gordon Terris]
Fans watch Nathan Evans on the main stage at TRNSMT at Glasgow Green Saturday [Photograph by Gordon Terris]
Fans watch Nathan Evans on the main stage at TRNSMT at Glasgow Green Saturday [Photograph by Gordon Terris]
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