What is Lord of the Rings 4th movie called?

There is no official "Lord of the Rings" movie called "The Lord of the Rings: The Fourth Movie".

The Lord of the Rings movie franchise consists of three main movies:

* The Lord of the Rings: The Fellowship of the Ring (2001)

* The Lord of the Rings: The Two Towers (2002)

* The Lord of the Rings: The Return of the King (2003)

There are also three Hobbit movies that precede the Lord of the Rings trilogy:

* The Hobbit: An Unexpected Journey (2012)

* The Hobbit: The Desolation of Smaug (2013)

* The Hobbit: The Battle of the Five Armies (2014)

There have been some discussions about a potential fourth Lord of the Rings movie, but nothing has been officially confirmed.