The line comes from Harry Potter and the Philosopher's Stone, released in 2001 and adapted from J. K. Rowling's 1997 novel. Gamekeeper Rubeus Hagrid, played by Robbie Coltrane, says it to Daniel Radcliffe's Harry on his eleventh birthday after tracking him down to reveal his parents were magical. The scene became one of the film series' most quoted moments. Clips and remixes spread widely on YouTube and later short form video, where the line is reused whenever someone discovers a hidden talent or obvious truth.