In 2009, Dillon starred in "When the Rain Stops Falling" at the Almeida, and in 2010 in "Design for Living" and its successor production "A Flea In Her Ear" at the Old Vic. Eldridge created the role of Lucy in "The Knot of the Heart", presented at the Almeida in March 2011, specifically for Dillon. In early 2012, Dillon played the role of Katharina in the Royal Shakespeare Company (RSC) Stratford and touring production of "The Taming of the Shrew". In 2013, she starred with Joel Samuels and William Troughton in "Happy New" (written by Brendan Cowell) and performed in London's West End.