Jeff Marx (born September 10, 1970) is a composer and lyricist of musicals. He is best known for creating the Broadway musical Avenue Q with collaborator Robert Lopez. Together, they wrote all the show's 21 songs. Lopez and Marx both write lyrics and they both write music, together, in the same room, at the same time.
Avenue Q won the 2004 Tony Award for Best Musical. Lopez/Marx's musical score earned them a 2004 Tony Award. Another 2004 Tony Award was awarded to Avenue Q bookwriter Jeff Whitty.
The musical's Original Cast Album, on the RCA/Victor label, was nominated for a Grammy Award. To date, it has sold over 150,000 copies.
Lopez and Marx met in the famed BMI Lehman Engel Musical Theater Workshop. Their very first project together, a spec Muppet movie, Kermit, Prince of Denmark, which was very loosely based on Hamlet, won them (as part of a tie) part of the $150,000 Kleban Award.
They are currently working on an original movie musical for Universal Pictures, and a new Broadway musical in collaboration with Matt Stone and Trey Parker, the creators of South Park.
Marx grew up in Hollywood, Florida. He attended the University of Michigan. He also holds a juris doctor degree from the Benjamin N. Cardozo School of Law and is a member of the New York Bar Association, but he does not practice law or represent himself.
Marx is well known in Broadway circles for his keen judgment, his abrasive sense of humor and his odd habit of heckling shows he dislikes. As a result he is considered a useful (or feared) critic of his colleagues' work. According to Broadway insiders, if you write a show and Marx sits all the way through without muttering snide comments, snorting or loudly farting, your show is in good shape.
Marx has also wrtten numerous books, including How To Win A High School Election.