Jeremy Irons (b. 1948) appeared in the 1988 Sesame Street Special (as one of the celebrities in the "Put Down the Duckie" segment).
His other film credits include Lolita, Die Hard: With a Vengeance , the remake of The Time Machine and as the voice of Scar in Disney's The Lion King. He won the 1990 Academy Award as Best Actor for his performance as Claus von Bulow in Reversal of Fortune, costarring Glenn Close.