Thor: Ragnarok is a 2017 American superhero film produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures. The film is based on the Marvel Comics superhero Thor, played by Chris Hemsworth. It's the sequel to 2011's Thor and 2013's Thor: The Dark World, and is the 17th film in the Marvel Cinematic Universe (MCU).

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The film received widespread critical acclaim for its action sequences, humor, and the performances of its cast, including Chris Hemsworth, Tom Hiddleston, Idris Elba, Cate Blanchett, and Tessa Thompson, among others. It was also a commercial success, grossing over $854 million worldwide.

The story follows Thor, the god of thunder, as he faces an impending doom known as Ragnarök, which is foretold to destroy his home planet of Asgard. However, Thor soon learns that Ragnarök is actually a premature event triggered by Surtur, a fire demon. Alongside the Hulk, Thor must stop Surtur and prevent the destruction of Asgard.

The movie was notable for its departure from previous Thor films in terms of tone and style, embracing a more comedic approach and incorporating 1980s pop culture references.