Witherspoon's death certificate states that his immediate cause of death was myocardial infarction, a medical term for a heart attack.
David Letterman, Ice Cube and Chris Tucker were among the celebrities attending a memorial service in honor of the actor.
Beloved actor John Witherspoon has died, but his legacy as America's dad will live on.
Witherspoon died at the age of 77 on Oct. 29, 2019.
The 'Friday' star passed away at age 77.
The actor died at his home in Sherman Oaks on Tuesday.