The Boy and the Heron (Japanese: 君たちはどう生きるか, Hepburn: Kimitachi wa Dō Ikiru ka, lit. 'How Do You Live?') is a 2023 Japanese animated fantasy film written and directed by Hayao Miyazaki. Produced by Studio Ghibli, the film's Japanese title references Genzaburō Yoshino's 1937 novel How Do You Live? but is not an adaptation of it. The film stars the voices of Soma Santoki, Masaki Suda, Ko Shibasaki, Aimyon, Yoshino Kimura, Takuya Kimura, Kaoru Kobayashi, and Shinobu Otake. Described as a "big, fantastical film", it follows a boy named Mahito Maki who moves to the countryside after his mother's death, discovers an abandoned tower near his new home, and enters a fantastical world with a talking grey heron.

Miyazaki announced his retirement in September 2013 but later reversed this decision after working on the short film Boro the Caterpillar (2018). He began storyboarding for a new feature-length project in July 2016, and official production began in May 2017. The film's title was announced in October 2017, targeting a release around the 2020 Summer Olympics. By May 2020, 36 minutes of the film had been hand-drawn by 60 animators, with no set deadline. Production spanned approximately seven years, facing delays as it navigated challenges related to the COVID-19 pandemic and Miyazaki's slowed animation pace, before nearing completion in October 2022. Financing for the project involved streaming deals for previous Ghibli films. According to producer Toshio Suzuki, The Boy and the Heron is the most expensive film ever produced in Japan. The screenplay draws heavily from Miyazaki's childhood and explores themes of coming of age and coping with a world marked by conflict and loss. Joe Hisaishi composed the film's score, while Kenshi Yonezu wrote and sang the film's theme song "Spinning Globe".

The Boy and the Heron was theatrically released in Japan on July 14, 2023, by Toho, and was screened in both traditional theaters and other premium formats such as IMAX. The release was noted for its intentional absence of any promotion, with Ghibli choosing not to release any trailers, images, synopsis, or casting details of the film in advance of its Japanese premiere except a single poster. The film received critical acclaim and grossed US$294.2 million worldwide, making it the fifth highest-grossing Japanese film of all time. Among its numerous accolades, the film won Best Animated Feature Film at the Academy Awards, the BAFTA Awards, the Golden Globe Awards, and the Japanese Film Academy.