The following year Gielgud staged perhaps his most famous Shakespeare production, a "Romeo and Juliet" in which he co-starred with Ashcroft and Olivier. Gielgud had spotted Olivier's potential and gave him a major step up in his career. For the first weeks of the run Gielgud played Mercutio and Olivier played Romeo, after which they exchanged roles. As at Oxford, Ashcroft and Evans were Juliet and the nurse. The production broke all box-office records for the play, running at the New Theatre for 189 performances. Olivier was enraged at the notices after the first night, which praised the virility of his performance but fiercely criticised his speaking of Shakespeare's verse, comparing it with his co-star's mastery of the poetry. The friendship between the two men was prickly, on Olivier's side, for the rest of his life.