Academy Award nominee Michael Clarke Duncan, who gained fame for his acclaimed role in the hit film The Green Mile, is dead at age 54, according to his fiancée, reality TV star Rev. Omarosa Manigault Stallworth.

Duncan had been suffering from complications following a near-fatal cardiac arrest he endured in July. He was discovered by Omarosa, who resuscitated the actor just in time to get him the proper medical treatment he needed in order to survive.

Although he remained in intensive care, reports at the time suggested that Duncan was expected to make a full recovery.

His publicist, Joy Fehily, released a statement from Omarosa confirming that Duncan died at Cedars-Sinai Medical Center in Los Angeles.

Duncan was nominated for a best supporting actor Academy Award for what continues to be his most memorable performance, in 1999’s The Green Mile. He played John Coffey, a sweet but imposing man, who’s been convicted of murder and possesses supernatural healing powers.

Besides The Green Mile, the 6-foot-4, 300 pound Duncan had memorable supporting roles in blockbusters like Armageddon, Sin City, Planet of the Apes and Talladega Nights: The Ballad of Ricky Bobby.