Mars One (Portuguese: Marte Um) is a 2022 Brazilian family drama film written and directed by Gabriel Martins. It tells the story of Deivinho (Cícero Lucas), a Black Brazilian youth who dreams of becoming an astrophysicist and joining a mission to the planet Mars. Deivinho's parents and sister are hard-working and support each other but live precariously on the outskirts of Belo Horizonte. The film dramatizes the social upheaval amongst Brazil's poor that greeted the election of populist Jair Bolsonaro.

The film premiered at the Sundance Film Festival and had a successful run at smaller film festivals, including jury wins at the L.A. Outfest and Nashville Film Festival. It was chosen as Brazil's entry in the 95th Academy Awards, but it was not nominated. It is distributed by ARRAY Releasing and went into wide release on Netflix (only in the USA) in January 2023.