Original: The Lord of the Rings film trilogy consists of three live action fantasy epic films: The Fellowship of the Ring (2001), The Two Towers (2002) and The Return of the King (2003) (often abbreviated to LotR for the trilogy, and FotR, TTT, and RotK for the individual films).
Simplified: The Lord of the Rings is a set of three fantasy movies: The Fellowship of the Ring (2001), The Two Towers (2002) and The Return of the King (2003).