The Best Century of My Life (Italian: Il più bel secolo della mia vita) is a 2023 Italian comedy-drama film directed by Alessandro Bardani in his feature film directorial debut, based on the play of the same name by Bardani and Luigi Di Capua, which also penned the screenplay alongside Leonardo Fasoli and Maddalena Ravagli. It stars Sergio Castellitto as Gustavo, a centenarian who never met his biological parents, and Valerio Lundini as an adoptee rights activist who uses him to circumvent a law preventing adopted children from learning the identity of their biological parents until they turn 100 years old. It was the final film role of actress Sandra Milo before her death in 2024.

The film premiered in competition at the 53rd Giffoni Film Festival on 23 July 2023, before being released on 7 September 2023 by Lucky Red. It was a box office bomb, grossing €337,723 on a budget of €2.6 million.