 Eyen is best known for works at opposite ends of the theatrical spectrum.Mainstream theatergoers became acquainted with him in 1981, when he partnered with composer Henry Krieger and director Michael Bennett to write the book and lyrics for the hit Broadway musical "Dreamgirls", about an African-American female singing trio.Eyen's career started, however, with experimental theatre that he wrote and directed Off-Off Broadway in the 1960s.