Dormer returned to the stage at the Theatre Royal Haymarket in October 2017 for the lead role in David Ives' "Venus in Fur". "The Telegraph" described her performance as "sensational" while Lyn Gardner says Dormer was "dominant in every way". In May 2018, Dormer co-wrote and starred as a blind pianist in revenge thriller "In Darkness". Following her audio work on Neverwhere, a August 2018 press-release announced Dormer would narrate the audiobook for Pottermore Publishing’s "Harry Potter: A History of Magic". Of the role, Dormer says she "always adored the Harry Potter books" and it was "fun to join the wizarding world family".