Natalie Schaefer, who portrayed the sophisticated Lovey Howell, brought elegance to the series but sadly passed away in 1991 at the age of 90. Russell Johnson, known for his role as the intelligent Professor, used his scientific knowledge to navigate island life but died in 2014 at 89. Alan Hale Jr., the lovable Skipper, was a guiding force among the castaways until his death from cancer in 1990 at 68.