Janet Montgomery is a British actress known for her versatile roles in both film and television. After initially training as a dancer, she pursued an acting career, gaining international visibility with a role in the film *Black Swan* (2010) and appearances in series such as *Human Target* and *Entourage*. Her breakthrough occurred primarily in television, where she has taken on leading roles. She portrayed the witch Mary Sibley in the historical fantasy series *Salem* (2014–2017), a performance that earned her a Fangoria Chainsaw Awards nomination for Best TV Actress. Subsequently, she solidified her popularity starring as Dr. Lauren Bloom in the main cast of the medical drama *New Amsterdam* (2018–2023), one of her most widely recognized roles. Her filmography also includes recurring roles in acclaimed series such as *This Is Us* and appearances in films like *The Space Between Us* (2017).