Micaela Diamond

Diamond made her professional debut in the musical television special of Jesus Christ Superstar Live in Concert on NBC as a featured member of the ensemble. She was also the understudy for Sara Bareilles' Mary Magdalene.

Diamond originated the role of Babe, the youngest version of Cher around the age of 7–19 in The Cher Show. Starring alongside Jarrod Spector, Teal Wicks, and Stephanie J. Block, she also appears on the musical cast album. On June 9, 2019, Diamond was named a 2019 Theatre World Awards honoree for her role as Babe in The Cher Show. Diamond was nominated for Best Breakout Broadway Performance of the Decade at the BroadwayWorld Theatre Fans' Choice Award for her performance in The Cher Show.

In 2019, Diamond originated the roles of Lindy and Dorothy in the world premiere of Ethan Coen's A Play Is a Poem at Los Angeles' Mark Taper Forum. The play ran from September 11 to October 13, 2019, and was scheduled to begin performances Off-Broadway at the Atlantic Theater Company's Atlantic Stage 2 in New York City beginning May 14, 2020, but was postponed due to the COVID-19 pandemic.

Diamond also originated the roles of Young Tori and Amelia in Williamstown Theatre Festival's world premiere production of Row which opened on July 17, 2021.

On May 17, 2022, it was announced that Diamond would play Lucille Frank opposite Ben Platt as Leo Frank in New York City Center's gala presentation production of Parade. Following their sold-out run at New York City Center, a limited Broadway transfer was announced on January 10, 2023, with Diamond and Platt continuing their roles as Lucille and Leo Frank. The revival began previews on February 21, 2023, opened March 16, 2023 at the Bernard B. Jacobs Theatre, and concluded on August 6, 2023.

Diamond originated and received acclaim for the role of Fritz, a covert revolutionary, in the 2023 Off-Broadway world premiere of Stephen Sondheim's final musical, Here We Are, an adaptation of two Luis Buñuel films.

On August 13, 2024, Diamond was announced as one of the cast members of the Ryan Murphy-produced FX-series Grotesquerie.

She appeared in The Seat of Our Pants in 2025, and was nominated for a Drama Desk Award and Outer Critics Circle Award.