Jonathan Croall is a theatre historian and biographer, and author of Performing King Lear: Gielgud to Russell Beale (The Arden Shakespeare, 2016), John Gielgud: Matinee Idol to Movie Star (Bloomsbury Methuen Drama, 2011) and Buzz Buzz! Playwrights, Actors and Directors at the National Theatre (Methuen Drama, 2008).