The superstar is also a producer on the new revival.
The Funny Girl star also opened up about being compared to Barbra Streisand.
Director Jon M. Chu excitedly confirmed the news on social media.
The 81-year-old singer made the scene on Sunday for the debut of "A Beautiful Noise: The Neil Diamond Musical."
The show at Circle in the Square opened Nov. 27 and will close after 44 preview performances and 17 regular shows.
The legend offered the 'Glee' alum kind encouragement for her role on Broadway as Fanny Brice.
Once a Gleek, always a Gleek.
The 'Phantom of the Opera' touring lead revealed earlier this year that he was diagnosed with stage 4 colon cancer.
'It’s like going back to the roots of why I love music and what I love about records,' Crowe said.
The James L. Nederlander and Hunter Arnold-produced show will open at the Marquis Theatre on June 23.
