In May 2014 Warchus was announced as the new Artistic Director of the Old Vic Theatre London, succeeding Kevin Spacey. His first season began in September 2015 directing a new play, "Future Conditional" by Tamsin Oglesby, starring Rob Brydon. In 2016 he also directed "The Master Builder" by Henrik Ibsen starring Ralph Finnes, "The Caretaker" by Harold Pinter starring Timothy Spall, Daniel Mays and George Mackay, and reunited with the same creative team as "Matilda" to create the world premiere of the musical "Groundhog Day". The musical ran for 8 weeks from July to September 2016 before transferring to the August Wilson Theatre on Broadway from April to September 2017. His second season saw him direct the 20th anniversary revival of "'Art'" starring Rufus Sewell, Tim Key and Paul Ritter from December 2016 to February 2017 (followed by UK tours in 2018 and 2019). He also directed a new adaptation of "A Christmas Carol" by Jack Thorne starring Rhys Ifans as Scrooge for Christmas 2017, and returned for Christmas 2018 starring Stephen Tompkinson as Scrooge. In 2019 he directed a revival of Noël Coward's "Present Laughter" starring Andrew Scott, followed by Duncan Macmillan's "Lungs" starring Claire Foy and Matt Smith before a return of "A Christmas Carol" starring Paterson Joseph. His production of "A Christmas Carol" was also performed on Broadway over the 2019-2020 festive season at the Lyceum Theatre starring Campbell Scott as Scrooge, with Andrea Martin and LaChanze. In 2020, Warchus was planned to direct Amy Herzog’s "4000 Miles" starring Eileen Atkins and Timothée Chalamet in April to May 2020, however due to the COVID-19 pandemic, the production has been postponed with the rescheduled dates to be announced. Also his production of "Lungs" which was due to transfer with Claire Foy and Matt Smith reprising their roles to the Brooklyn Academy of Music, New York in March to April 2020 was also cancelled due to the pandemic, however it was announced that Foy and Smith with perform the play in a socially-distanced version live from The Old Vic to be streamed to audiences via Zoom from 26 June to 4 July. For Christmas 2020, his production of "A Christmas Carol" has been announced to return for its fourth consecutive season at The Old Vic, as well as a return to Broadway (theatre and details to be announced).