Leslie Nielsen was 55 in Airplane II: The Sequel when he played the character 'Dr. Rumack (archive footage)'.
That was over 41 years ago in 1982.
In 2010 he died aged 84, starring in 123 films in his career, 59 of those after Airplane II: The Sequel was first released. If he were alive today he would be 98.
In Airplane II: The Sequel, I think Leslie Nielsen looks: