Alex Mann aka Alex from Glasto releases debut single What Ya Kno About That Bro?

Six weeks ago, he was finishing up his GCSEs. Now the viral festival sensation has a song out.

Viral sensation Alex Mann has released his debut single.

The 15-year-old was the talk of social media during Glastonbury weekend when chart-topping rapper Dave brought him on stage for an impromptu performance, shocking the audience and those watching at home with his rapping ability.

The pair's collaboration of Dave & AJ Tracey's Thiago Silva has since clocked up nearly six million views on YouTube alone. The touching moment was so popular that the original version appeared in the Official Singles Chart Top 40 for the first time following the festival, topping out at Number 36.

Now #AlexfromGlasto has shared his first original song What Ya Kno About That Bro? released via 3 Beat Productions, the home to artists such as Cheryl and Sigma.

"I'm so grateful for what's happened," Alex tweeted. "6 weeks ago I finished my GCSEs and then went to Glastonbury with a few of my mates. Dave changed my life forever."

What Ya Kno About That Bro?'s official video was premiered by GRM Daily. Watch Alex and his friends on their bikes in-front of light tubes below.