Direct quote from material on the internet:
The Broadway adaptation of Smash underwent a significant transformation in its ending between its opening night on April 10, 2025, and the present. Initially, the musical concluded with a dark and dramatic twist: Ivy Lynn, the central character, dies onstage during a high-energy number, symbolically mirroring Marilyn Monroe’s tragic fate. This ending was supported by producer Steven Spielberg and embraced during the first table read, as it was deemed powerful and structurally sound
However, during early workshops, audiences reacted negatively to this grim conclusion. The backlash was largely due to the charisma and popularity of actress Robyn Hurder, who portrayed Ivy. Audiences disliked the final act without Ivy and criticized the downbeat tone. As a result, the creative team decided to alter the ending. In the revised version, Ivy survives, and the fictional show Bombshell within the musical fails due to its somber ending. This change allowed the musical to retain its meta elements and humor, earning audience praise despite mixed reviews .
The final version of Smash now ends on an upbeat note, reflecting a more optimistic tone while still acknowledging the challenges of Broadway productions. This adjustment was part of a broader effort to make the stage adaptation distinct from the TV series, focusing on a comedic backstage narrative about staging a Marilyn Monroe musical .
CZJ at opening night party for A Little Night Music, Dec 13, 2009.