Osgood Robert "Oz" Perkins II (born February 2, 1974) is an American filmmaker and actor. He began his career as a child actor, portraying the young version of his father, Anthony Perkins' character Norman Bates in Psycho II (1983), and later appeared in films such as Six Degrees of Separation (1993), Legally Blonde (2001), Not Another Teen Movie (2001), Star Trek (2009), and Nope (2022).

He made his directorial debut with the horror film The Blackcoat's Daughter (2015) and has since become known for directing horror films such as I Am the Pretty Thing That Lives in the House (2016), Gretel & Hansel (2020), Longlegs (2024), and The Monkey (2025). He co-founded the production company Phobos with producer Chris Ferguson.