John Witherspoon’s official cause of death has been revealed. The “Friday” star died from coronary heart disease, according to his death certificate,obtained by TMZ. The document also states Witherspoon suffered from hypertension. Witherspoon, 77, died on Oct. 29 at his Sherman Oaks, Calif., home after suffering a heart attack. His family announced the sad news in a statement, calling him one of the “hardest working men in show business.” The statement continued, “He was a Legend in the entertainment industry, and a father figure to all who watched him over the years. We love you ‘POPS’ always & forever.” Witherspoon is survived by his wife, Angela, and his sons, JD and Alexander.