Born in New York City to Henry Horowitz and Rose Klein, Jewish immigrants from Hungary, Heyward intended to become a lawyer but started writing radio scripts part-time.
He also wrote material for The Ernie Kovacs Show, eventually becoming head writer for that series and winning a Sylvania Award for comedy writing.
[5] Heyward wrote scripts for Winky Dink and You, a children's show hosted by Jack Barry that ran on CBS from 1953 – 1957, that was created by Harry Prichett and Edwin Brit Wyckoff.
[7] In the early 1960s, Heyward relocated to Los Angeles and worked various executive positions at 20th Century Fox, Music Corporation of America, and Four Star Television.
[12] While Heyward was with Charnay, he gained the vital leadership experience and contacts to then become a Senior Vice President for Hanna-Barbera,[13] where he was in charge of live programming and movies of the week.
[17][18] Andy was known as the chairman and chief executive officer of animation studio, DiC Entertainment, until its June 20, 2008, acquisition by[19] and subsequent folding into[20] Cookie Jar Group.