Chadwick Boseman not only kept his battle with cancer out of the public eye, he also kept it from Marvel Studios.
It was announced last week in a statement by family that the actor had died after a battle with colon cancer.
The Hollywood Reporter has revealed Marvel Studios were not aware of Boseman's cancer diagnosis.
The star was even able to evade semi-traditional physical examinations by doctors before filming, as large studios often forgo the process, a film finance lawyer told The Hollywod Reporter.
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Studio head Kevin Feige was sent an email with limited information within an hour of the star's death but by the time Feige read the memo, the actor had died.
The Hollywood Reporter has said a source close to the actor thought he had beaten cancer and would be back in time to star in "Black Panther II".
The actor only found out how serious his condition was a week or so before he died.
Only a few people close to Boseman knew about his poor health, including Logan Coles his producing partner, his agent, trainer and Brian Helgeland, the director of "42", the film which launched his career.
Disney has not made any announcements regarding the plans of "Black Panther II".