He's the man of the moment, featuring on the Disclosure track Holding On.
But before appearing on that single, he was already a well-liked figure in the jazz world, winning a Grammy in 2014 for his third album, Liquid Spirit.
Gregory Porter is no stranger to a festival - he appeared on the West Holts stage at Glastonbury this year.
However this is his first time at V Festival - and he's shared exclusively with Newsbeat, what it's like to be backstage.
"Another dope experience had in the UK."
Conor Maynard was telling an interviewer that he was a fan of Gregory - minutes later the pair bumped into each other.
Performing can be hungry work - luckily Masterchef star Luke Thomas is on hand to provide some much needed sustenance.
This is where all the artists have their dressing rooms. Behind Gregory and Duke Dumont you can see where Jessie J and Paloma Faith have been getting ready.
Both Ella Henderson and Gregory have a strong hat game. With her voice, Ella could be "Beyonce's sister," says Gregory.
The rain hasn't stopped Ellie Goulding from enjoying V Festival. Earlier she tweeted a message to the crowds thanking them for being "so lovely and fun and smiley".
Soul singer Sherry Davis was pleased to meet Gregory.