<P> Thor: Ragnarok is a 2017 American superhero film based on the Marvel Comics character Thor, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures . It is the sequel to 2011's Thor and 2013's Thor: The Dark World, and is the seventeenth film in the Marvel Cinematic Universe (MCU). The film is directed by Taika Waititi from a screenplay by Eric Pearson and the writing team of Craig Kyle and Christopher Yost, and stars Chris Hemsworth as Thor alongside Tom Hiddleston, Cate Blanchett, Idris Elba, Jeff Goldblum, Tessa Thompson, Karl Urban, Mark Ruffalo, and Anthony Hopkins . In Thor: Ragnarok, Thor must escape the alien planet Sakaar in time to save Asgard from Hela and the impending Ragnarök . </P> <P> A third Thor film was confirmed in January 2014, with Kyle and Yost beginning work on the screenplay . The involvement of Hemsworth and Hiddleston was announced that October . Waititi joined the film as director a year later, after The Dark World director Alan Taylor chose not to return . Ruffalo joined the cast reprising the role of Hulk from previous MCU films, which allowed elements of the 2006 comic storyline "Planet Hulk" to be adapted for Ragnarok . The rest of the cast, including Blanchett as Hela, was confirmed in May 2016, with Pearson's involvement revealed at the start of filming in July 2016 . Principal photography took place in Brisbane and Sydney, Australia, with the film also having exclusive use of Village Roadshow Studios in Oxenford, concluding in October 2016 . </P> <P> Thor: Ragnarok premiered in Los Angeles on October 10, 2017, and was released in the United States on November 3, 2017, in 3D, IMAX, and IMAX 3D . The film received highly positive reviews, with many critics declaring it the best film of the Thor trilogy and praising Waititi's direction, the cast's performances, action sequences, soundtrack, and humor . It has grossed over $853 million, making it the highest - grossing film of the Thor series and ninth highest - grossing film of 2017 . </P> <P> Two years after the battle of Sokovia, Thor has been unsuccessfully searching for the Infinity Stones, and is now imprisoned by the fire demon Surtur in Muspelheim . Surtur reveals that Thor's father Odin is no longer on Asgard, and that the realm will soon be destroyed in the prophesied Ragnarök, once Surtur unites his crown with the Eternal Flame that burns in Odin's vault . Thor defeats Surtur and claims his crown, believing he has prevented Ragnarök . </P>

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