Sidney PoitierThe cause of his death was determined after more than one week.

The legendary actor died on Jan. 6 from a combination of heart failure, Alzheimer’s dementia and prostate cancer, according to a death certificate obtained by TMZ. He was 94.

He had been suffering from cancer and dementia for many years. However, the document states that he suffered heart failure just hours before his death.

The online copy stated that Poitier died at his Beverly Hills residence and was cremated. The death certificate also mentioned Poitier’s history as an actor of 76 years.

Poitier was a star in many films during his long career. Porgy and Bess, The Sun is a Raisin, To Sir, In Love Guess Who Is Coming To Dinner.

In 1964, he made Oscar history when he became the first Black man to win an Academy Award in the Best Actor category for his role of Homer Smith in Lilies of the Field. More than three decades later, he received an honorary Oscar “in recognition of his remarkable accomplishments as an artist and as a human being,” per the Academy of Motion Picture Arts and Sciences’ database.