She later began a collaboration with director Tom Hooper, working on Elizabeth I, The Damned United, The King's Speech, Les Misérables, and The Danish Girl.
[2] Stewart studied theatre design at Central Saint Martins, and later acquired a Masters in Architecture from the Royal College of Art.
Eventually, she did a play for Mike Leigh at the Hampstead Theatre, who then offered her the post of art director for an upcoming project.
[6][7] In 2000, Stewart was the set designer for New Year's Day, Saving Grace, and Sorted, while in 2001 she served that position on Goodbye Charlie Bright and The Hole.
[9] In 2008, Stewart served as production designer on the thriller film Fifty Dead Men Walking.
Before working on the film, she researched the settings for the script by viewing old newsreels and touring the Victoria and Albert Museum.
[12] Stewart was later hired on Muppets Most Wanted[13] and has served as production designer on Paul McGuigan's Victor Frankenstein.