The line comes from The Fellowship of the Ring, the first film in Peter Jackson's Lord of the Rings trilogy, released in 2001 and based on J. R. R. Tolkien's novel. At the western entrance to Moria, Gandalf realises the inscription does not ask for a password, but simply says speak friend and enter, so he says mellon, the Sindarin word for friend. The doors then open, and the moment has become a favourite shorthand online for friendship, welcome and hidden entrances, reused in edits, reaction videos and fantasy-themed posts long after the film's release.