John Green (born August 24, 1977) and Hank Green (born May 5, 1980) are known on YouTube as the Vlogbrothers. The channel was originally made in 2007 to host a project called Brotherhood 2.0, but has continued on since then in a similar format.

Hank Green is a musician and entrepreneur, while John Green is an award winning author. As well as Vlogbrothers, they run the educational channels Scishow (Hank only), Mental floss (John only) and Crash Course, a gaming channel called hankgames, a podcast called Dear Hank and John, and a video quiz show called Truth or Fail.