Debbie Reynolds -- who rose to stardom in "Singin' in the Rain" and quickly became a staple among Hollywood royalty -- died Wednesday as a result of a stroke, TMZ has learned ... just one day after her daughter Carrie Fisher passed away ... this according to her son Todd. Debbie was rushed to a hospital shortly after 1 PM when someone at the Beverly Hills home of her son, Todd, called 911 to report a possible stroke. We're told Debbie and Todd were making funeral plans for Carrie, who died Tuesday of cardiac arrest. Debbie famously divorced Eddie Fisher...