William Andrew Stamper, better known as Stamper is a YouTube animator/voice actor. He has been a member of staff at Newgrounds. He started out as an author and fan on Newgrounds, got involved in Newgrounds-related design work, and was given a job as Newgrounds's media designer in 2003. That year, he made a new site layout, which was well received by the Newgrounds community. Stamper also does voice work on Youtube and Newgrounds.