Gandalf Sax, also known as Epic Gandalf Sax, is a viral video of Lord of the Rings character Gandalf (Ian McKellen) nodding his head in a loop in time with the Epic Sax Guy music. The video became an iconic Lord of the Rings meme and became the subject of one of the most popular 10-Hour Videos in internet history during the 2010s. It's also used as an exploitable in other memes and remixes where people set the video to various music.