DETROIT -- Actor Richard Harris, starring in 'Camelot' at Detroit's Masonic auditorium, was listed in good condition Saturday in the Cardiac Care Unit of Henry Ford Hospital.
Harris, 47, complaining of chest pains, left the theater during intermission Friday night.
An understudy took over as King Arthur to finish the performance.
A spokeswoman for for the theatre said doctors were '99 percent sure he did not have a heart attack,' but he is being held for observation. Harris was not expected to return to the stage before Tuesday.
'I am ill,' the actor reportedly said when the curtain fell after the first two hours of the performance, the spokeswoman said. She said he walked into an ambulance and did not collapse either on or off stage, as had been reported.
Harris had been appearing eight times a week in the show which has been extended to Oct. 11. Harris, who started in the 1966 movie version of the musical, reportedly draws a salary of $50,000 a week for his performance in the production.