Horwitz was born in Dayton, Ohio, on September 28, 1949, to Alan S. (a physician) and Charlotte (née Vangrov) Horwitz. He is married to singer Lisa Miller and has three children, Charles, Ann, and Alexander. They live in Chevy Chase, MD.[1]
Horwitz graduated from Kenyon College with a bachelor of arts degree, with a dual major, in English and Drama.[2] In 1992, he received an honorary doctorate of fine arts from Kenyon College.[2]
In 1973, after moving to New York City, Horwitz appeared in the one-man show, An Evening of Sholom Aleichem, which was directed by Richard Maltby Jr., and in which he continues to perform at The Kennedy Center, The Manhattan Theatre Club, and The New York Shakespeare Festival/Public Theater.
He became the assistant director of Opera-Musical Theater at the National Endowment for the Arts in 1987.[4] Since 1998, Horwitz has been creative consultant to the annual Mark Twain Prize ceremonies at the Kennedy Center.
In 1989, he began his career at NPR, where he was instrumental in giving radiogame showWait Wait... Don't Tell Me! its start.[2] He is also frequently a panelist on another public radio game show, Says You!. He was also involved with Wynton Marsalis: Making the Music, and The NPR Basic Jazz Record Library.[5] Horwitz received three Peabody awards for his work at NPR.[2]
In 2002, Horwitz became the founding director of the AFI Silver Theatre and Cultural Center, in Silver Spring, Maryland. He was the director and chief executive officer from 2002[2] until 2009.[6][7][8][9] He later served in fundraising positions at Washington National Opera and the Washington Performing Arts Society.[4]
In 2016, Horwitz took over as host of WAMU's The Big Broadcast old-time radio show.[10]
He gave Lin-Manuel Miranda critical suggestions and bought him his first rhyming dictionary when Miranda was writing his first play, In the Heights.[11]
He is also a co-host of the podcast "Question of the Day".