They wrote the music and lyrics to their musical Dear Evan Hansen, which was inspired by a traumatic incident in Pasek's life, the death of a high school student, and based on a book by Steven Levenson. Directed by Michael Greif and starring Ben Platt, it premiered at the Arena Stage in Washington, D.C. on July 30, 2015. It premeiered Off-Broadway debut in March 2016 at the Second Stage Theatre, and on Broadway on November 14, 2016, opening three weeks later at the Music Box Theatre. At the 71st Tony Awards, it was nominated for nine awards including Best Musical, Best Score, Best Book of a Musical, and Best Actor in a Musical for Platt. It won six awards including Best Musical and Best Original Score for the duo. At the 2018 Grammy Awards, Dear Evan Hansen won Best Musical Theater Album. The musical received the Edgerton Foundation New Play Award and the 2016 Obie Award for Musical Theatre.