He holds a Bachelors of Fine Arts degree in acting from the City College of New York.
At one time, he wanted to be a pilot in the Air Force.
He started taking acting classes at the suggestion of his high school guidance counselor.
His mother got the name "Keeshan" from actor Bob Keeshan (aka Captain Kangaroo).
Attended Dewitt Clinton High School; the same school attended by Marvel Comics founder Stan Lee, writer/activist James Baldwin, playwright Neil Simon, and actor Judd Hirsch.