(USA TODAY) -- Actor Michael Clarke Duncan, who is known for his Oscar-nominated role in The Green Mile, has died, reports the Associated Press. The wire service is attributing the news to his fiancee, Omarosa Manigault-Stallworth.
Duncan was hospitalized in Los Angeles after a heart attack in July.
At that time, publicist Joy Fehily said in a brief e-mail statement that the 54-year-old actor suffered a myocardial infarction.
As soon as the news broke, Hollywood stars began sharing their reactions on Twitter. Here are some:
Mario Lopez: "R.I.P Michael Clarke Duncan... One of the nicest & most professional guys I've had the pleasure of knowing. So sad..."
Michael Chiklis: "R.I.P. Michael Clarke Duncan. :.("