The cause of 13-year-old Broadway actress Laurel Griggs' death has been revealed. Griggs' family told The Post that she died on Nov. 5 in New York City, according to Page Six. The teenager was rushed to Mount Sinai Hospital, her grandfather, David B. Rivlin, told the outlet. Doctors were unable to revive her. "The world lost a real princess who only wanted to make the future happy for all," Rivlin said on Sunday i…
