Maika Monroe (born Dillon Monroe Buckley; born May 29, 1993) is an American actress. She made her film debut with the drama At Any Price (2012) and led the thriller film The Guest and the horror film It Follows (both 2014), which established her as a scream queen. She starred in the thrillers Greta (2018) and Watcher (2022), as well as the horror film Longlegs (2024).

In addition to her horror and thriller roles, Monroe appears in the action film Independence Day: Resurgence (2016), the neo-noir Hot Summer Nights (2017), the black comedy Villains (2019), and the action film God Is a Bullet (2023).