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.
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 grossed $854 million, becoming the highest-grossing film of the Thor series and ninth highest-grossing film of 2017.