The Canadian star - real name Louis Harold Jacobovitch - passed away in his home in Manhattan, New York on Friday (23Oct09), reports the Associated Press.
Jacobi made his debut on Broadway in 1955 with a role in The Diary of Anne Frank before starring in nine other Broadway plays, including 1959's Tenth Man and Neil Simon's Come Blow Your Horn in 1961.
He also starred in a number of movies, including Arthur with Dudley Moore, Woody Allen's Everything You Always Wanted To Know About Sex * (*But Were Afraid To Ask), and I.Q. alongside Meg Ryan and Tim Robbins.
Jacobi is survived by his brother, Rabbi Avrom Jacobovitch, as well as sister Rae Gold.