Before Sauron, there was Morgoth. Here's what you need to know about the Lord of the Rings' first big bad, who even predates the Rings of Power.

Sauron wasn't Middle-earth's first Dark Lord. Heading into the premiere of Amazon's 'The Lord of the Rings: The Rings of Power,' here's everything viewers should know about Morgoth.

If you're wondering who Morgoth is in The Rings of Power, we've got you covered. Here's what you need to know.