Joe Jackson, the father and the manager of the Jackson family of entertainers, has become gravely ill, TMZ reports .
The entertainment news website says Jackson has terminal cancer, and a source told TMZ he is in end stages of his battle with it. Jackson, who managed The Jackson 5, is 89 years old.
A report in 2015 says Jackson suffered thee heart attacks and a stroke after taking a birthday trip to Brazil. He also suffered a fall after being released from the hospital.