Janet Ruth Montgomery (born 29 October 1985) is an English film and TV actress. She is known for her role as Ames in the second season of Fox's Human Target, and also for her appearances in The Hills Run Red and Wrong Turn 3: Left for Dead, as well as her role as Eric Murphy's assistant Jennie in HBO's Entourage. She recently played protagonist Martina Garretti in the short-lived Made in Jersey. From 2014 to 2017, she starred as the lead character, Mary Sibley, in the WGN America series, Salem. She is also known for her role as the mother of Gardner Elliot, Sarah Elliot in the 2017 film The Space Between Us.
Although trained as a dancer at the Stella Mann College of Performing Arts, Bedford, Montgomery chose to pursue acting rather than dance professionally. Her lack of drama school training made it difficult for her to obtain acting representation initially. She achieved her breakthrough after producing a play with her friend Gethin Anthony.