[3] At the age of 11, Dew was cast as Karen in the CBBC comedy-drama Monster TV, which aired in 1999.
In 2008, Dew made her professional stage debut as Viola in Twelfth Night at Regent's Park Open Air Theatre,[5] for which she earned an Ian Charleson Award nomination.
[6] Dew originated the role of Jess in the stage musical adaptation of the football film Bend It Like Beckham, which premiered at the Phoenix Theatre on the West End in 2015.
In 2020, Dew began starring as lead character Emily Verma in the Gold sitcom Sandylands.
Recently, Dew has been credited as the voice behind Zara Kahn, the newest recurring character addition to the cast of the long-running FX action/comedy adult animation series, "Archer," during its 14th and final season, as well as the series' 1 hour finale, both of which premiered in 2023.