The revival will be directed by Thea Sharrock, with sets and costumes by John Napier, lighting by David Hersey, and sound design by Gregory Clarke.
Equus tells the story of a deeply disturbed 17-year-old boy, and the psychiatrist who attempts to treat him. The original Broadway production of Equus opened in 1974 and ran for 1,209 performances. Peter Firth and Anthony Hopkins created the roles of Strang and Dysart, respectively; Hopkins was succeeded in his role by such actors as Richard Burton, Alec McCowen, Anthony Perkins, and Leonard Nimoy.
Mulgrew's recent stage credits include Tea at Five, Our Leading Lady, and Iphigenia 2.0. She is well known for her work in such television series as Star Trek: Voyager and Ryan's Hope. Radcliffe is best known for playing Harry Potter in the series of films based on J.K. Rowling's novels; Griffiths, who appears in those films as Harry's uncle Vernon Dursley, won the Tony and Olivier Awards for his portrayal of Hector in The History Boys.