Grom: Boyhood (Russian: Гром: Трудное детство) is a 2023 Russian superhero film directed by Oleg Trofim and written by Artyom Gabrelyanov, Evgeny Fedotov and Ekaterina Krasner, based on the Major Grom comic book series by Russian publisher Bubble Comics. The third film in the Bubble comic book adaptation series, a prequel to Major Grom: Plague Doctor. The plot sets in 90s and tells about the past of police major Igor Grom (Kay Aleks Getts) and the life of his father, Major Konstantin Grom (Sergey Marin).

The project was announced in December 2021, and at the same time, Trofim was appointed as the director. Principal photography took place from March to May 2022 in Saint Petersburg. Major Grom. Special premiered on January 1, 2023. The prequel received a mostly positive response from critics, praising the setting, acting, and special effects. The next movie, Major Grom: The Game, is in development.