Bill Paxton's death certificate said the actor died last month from a stroke, days after surgery to replace a heart valve and repair damage to his aorta. The document also states Paxton was cremated. The prolific actor died late on February 25th, which was 11 days after the surgery. His death was announced hours before the Oscars. Paxton starred in films such as "Twister," "Titanic" and the HBO TV series "Big Love."