Born in Bournemouth, England on 29th October 1984 Janet began her acting career at the age of 12, when she appeared on British children show Short Change, with her brother Jason. In 2008, she was cast as the love interest of Nicholas Hoult in an episode of the teen drama Skins. Janet appeared in both the critically acclaimed Dis/Connect and short film Flushed. After a few years of living in London, she moved to Los Angeles so she could pursue her acting career.
In September 2008, it was announced Janet had signed on to portray the role of Serina in Dark Castle Entertainment’s Slasher Horror film The Hills Run Red. Filming took place in Sofia, Bulgaria. Despite Janet’s performance being well received, critical reception was negative.
In April 2008, Janetannounced she had signed on to portray the role of Alex, the leading female character of Wrong Turn 3: Left for Dead, the third instalment of the Cannibal Horror trilogy series Wrong Turn.
She portrayed the role of Fallyn Werner in the Lifetime film Accused at 17. The film follows “a teenager accused of murdering a fellow classmate claims to have been framed by her best friend. Her mother tries to find the truth”. Critical reception was positive with Janet’s performance being claimed to be the breakout role of the film.
In November 2009, Janet returned to London, England to portray the role of Giselle in the independent Horror film Dead Cert. She also has a small role as Ruth in the upcoming mystery film The Rapture which has yet to have an official release date.
In March 2010, Janet was cast to portray the supporting role of Madeline in psychological thriller Black Swan. The film starred Mila Kunis, Natalie Portman and Winona Ryder. Filming took place in late 2009 and the film was released in the US on December 3, 2010.
In December 2011, Janet starred as Princess Mithian in Series 4 Episode 11 of Merlin, as a love interest of King Arthur.