The product line focuses on the fictional world of Middle-earth, the films follow the hobbit Frodo Baggins as he and the Fellowship embark on a quest to destroy the One Ring, to ensure the destruction of its maker, the Dark Lord Sauron.

Meanwhile, Aragorn, heir in exile to the throne of Gondor, along with Legolas, Gimli, Boromir, Merry, Pippin and the wizard Gandalf, unite to rally the Free Peoples of Middle-earth in the War of the Ring in order to aid Frodo by distracting Sauron's attention.

The product line focuses on the tale of Bilbo Baggins, who is convinced by the wizard Gandalf to accompany thirteen Dwarves, led by Thorin Oakenshield, on a quest to reclaim the Lonely Mountain from the dragon Smaug.

[9] In May 2013, Rich-K and Big J had designed a Helm's Deep model contained a total of 150,000 Lego bricks and 1,700 mini-figures that based on The Lord of the Rings film trilogy.

[10] In December 2013, Alice Finch and David Frank had designed The Rivendell model contained a total of 200,000 Lego bricks that based on The Lord of the Rings film trilogy.

The Lego construction toy range was based on the film trilogy and developed in collaboration with Warner Bros. Consumer Products.

[27][28] It was officially announced by The Lego Group that the seven sets based on The Lord of the Rings film trilogy was released on 16 May 2012.

Later, it was announced that Lego The Lord of the Rings (video game) was released on 30 October 2012 and also included Elrond minifigure as a free gift.

[50] Each of the sets featured eight core characters,[15] named Frodo Baggins, Gandalf the Grey, Aragorn, Samwise Gamgee (Sam), Gimli, Peregrin Took (Pippin), Meriadoc Brandybuck (Merry) and Legolas Greenleaf.

In 2012, it was officially announced by The Lego Group that the six sets based on The Hobbit film trilogy was released on 27 November 2012.

[80][e][37] In 2014, it was announced that the Lego The Hobbit (video game) was released on 8 April 2014 and also included Bilbo Baggins minifigure as a free gift.

[82][37] Each of the sets feature 15 core characters,[56] named Bilbo Baggins, Gandalf the Grey, Thorin Oakenshield II, Balin, Dwalin, Kíli, Fíli, Dori, Nori, Ori, Óin, Glóin, Bifur, Bofur and Bombur.

[84] The Battle of Helms Deep (set number: 50011) was released on 1 August 2013 as a part of Lego Games theme and The Lord of the Rings film trilogy.

We aimed to add as much detail as possible and create an engaging experience throughout the build to delight fans recreating scenes or proudly displaying Elrond’s home.

Mike said, “For the development of this, we’re collaborating with Warner Brothers,” and continued, “They’re the ones that made the Hobbit movies, and then I’m not an expert on this, I guess they currently own the rights to the Lord of the Rings film trilogy.

So yeah, it was a super great collaboration, we didn’t work directly with anyone that had done any of the production design in the original film trilogy, which could have been awesome.

But they had plenty of resources for us to get what we needed to make this model as authentic as it is.”[95] The product line was accompanied by a series of animated short films that was released on YouTube.

[121][122] The game is a follow-up to Lego The Lord of the Rings based on the first two Hobbit films; An Unexpected Journey and The Desolation of Smaug.

[117][f] The crossover toys-to-life game Lego Dimensions[132][133][134] developed by Traveller's Tales features content based on the original The Lord of the Rings.

A "Starter Pack" includes an additional level that recreates the events of the original film and adds Gandalf as a playable character.

[144][145] In October 2013, Lego The Lord of the Rings video game was listed as one of the BAFTA Kids’ Vote Top 10s.

[148] Rivendell (set number: 10316) received positive reviews, described by Gizmodo as a "must have" for fans of the franchise, but criticised its price of US$500.