Curiosidades

She is trained in mixed martial arts.

She speaks Russian and Spanish.

She is a vintage car enthusiast.

Founded the production company Fifty-Fifty Films.

Is considered a modern day scream queen due to her numerous roles in horror films. Sweeney herself is a fan of horror, her favorite horror films that inspired her to act in the genre being O Bebê de Rosemary (1968), Halloween - A Noite do Terror (1978), O iluminado (1980), A Hora do Pesadelo (1984), O Silêncio dos Inocentes (1991), Hereditário (2018), and Nós (2019).

She has a younger brother, Trent Sweeney, who also worked as an actor.

Despite her status as an iconic blonde bombshell, Sweeney is actually a natural brunette. She had to dye her hair blonde for the role of Cassie Howard in Euphoria (2019), and despite it being associated with her ever since, the constant re-application of hair dye led to her natural hair getting damaged.

Miu Miu ambassador.

She ended her engagement to producer Jonathan Davino in 2025. He co-produced her film Imaculada (2024).

She played the title role in Christy (2025). Despite good reviews, the film flopped at the box office. Ruby Rose, who was passed over for a role in the film, blamed Sweeney for the film's failure.