Hollywood star Sidney Poitier’s cause of death has been confirmed two weeks after he passed away at the age of 94.

The Bahamian-American actor was known for films including In The Heat Of The Night, Blackboard Jungle and Guess Who’s Coming To Dinner – and was the first black man to win the Oscar for best actor.

According to a copy of his death certificate obtained by TMZ, he died from a combination of heart failure, Alzheimer’s dementia and prostate cancer.

Poitier was survived by his wife of 46 years, Joanna Shimkus Poitier.

Jeffrey Wright, Whoopi Goldberg and Joseph Gordon-Levitt were among the celebrities who paid tribute following news of his death on January 6.

Bond star Wright said on Twitter: “Sidney Poitier. What a landmark actor. One of a kind. What a beautiful, gracious, warm, genuinely regal man. RIP, Sir. With love.”

Goldberg quoted the lyrics to the song To Sir With Love, which soundtracked Poitier’s 1967 film.

She said on Twitter: “If you wanted the sky i would write across the sky in letters that would soar a thousand feet high.. To Sir… with Love. Sir Sidney Poitier R.I.P. He showed us how to reach for the stars.”

While Gordon-Levitt described him as an “An absolute legend. One of the greats”.