In 2000, she made her Broadway debut as Lily in Richard Nelson's James Joyce's The Dead.
In 2004, she made her West End debut creating the title role in Andrew Lloyd Webber's The Woman in White, directed by Trevor Nunn, which she then reprised on Broadway.
Also on Broadway she created the role of Miss Dorothy Brown in Thoroughly Modern Millie, for which she was nominated for an Outer Critics Circle Award.
[1] On television, Christian has appeared in episodes of Law & Order, House of Cards, and Unforgettable.
In 2017, Christian was set to co-produce the film Silver Wings with author Katherine Sharp Landdeck.