The online gaming superstar, aka Felix Kjellberg, hit the milestone on Monday (07Sep15) and took to Twitter.com to share the news with his faithful followers, who tune in religiously to watch PewDiePie play.

He write, "THIS IS INSANE."

The gaming superstar launched his YouTube channel in 2008 and has amassed almost 40 million subscribers, becoming the most popular person on the site in 2013.