This Boy's Life (titled onscreen as This Boy's Life: A True Story) is a 1993 American biographical coming-of-age drama film directed by Michael Caton-Jones. It is based on the eponymous memoir by author Tobias Wolff. The film stars Leonardo DiCaprio, Robert De Niro, and Ellen Barkin. This was DiCaprio's theatrical film debut.

The film also features Chris Cooper, Carla Gugino, Eliza Dushku and Tobey Maguire's first credited appearance in a feature-length movie.

It was the first collaboration on-screen between Maguire and DiCaprio, who both later worked in Don's Plum (2001) and The Great Gatsby (2013), and also the first collaboration on-screen between DiCaprio and De Niro, who both later worked in Marvin's Room (1996), short film The Audition (2015), and the film Killers of the Flower Moon (2023).