Walter Moreira Salles Júnior (/ˈsɑːlɪs/; Brazilian Portuguese: [ˈvawteʁ ˈsalis]; born 12 April 1956) is a Brazilian filmmaker. A major figure of the Resumption Cinema in Brazil, Salles is widely regarded as one of the greatest Brazilian filmmakers of all time. His accolades include an Academy Award accepted for Best International Film, three Cannes Film Festival prizes, three Venice Film Festival prizes, two British Academy Film Awards, a Golden Bear and a Golden Globe.

He first became internationally known for his film Central Station (1998), which earned two Academy Awards nominations, for Best Foreign Language Film and Best Actress for Fernanda Montenegro, winning a Golden Globe and a BAFTA for Best Foreign Language Film as well as the Golden Bear at the 48th Berlin International Film Festival. His subsequent works include Behind the Sun (2001), The Motorcycle Diaries (2004), Dark Water (2005) and On the Road (2012). At the 97th Academy Awards, his critically acclaimed film I'm Still Here (2024) received a rare double nomination for Best Picture and Best International Feature; it won the latter, becoming the first Brazilian film to win an Academy Award in any category.