Mary Grace Ellerbee is currently Associate Music Director of the Pretty Woman: The Musical 2nd National Tour. Previous: Keyboard 2 on the North American tour of CATS by Andrew Lloyd Webber. Other local credits include Ragtime, 9 to 5, The Drowsy Chaperone, Sister Act, Cinderella, and Anything Goes, including Theatre Baton Rouge's 2018 production of Little Shop of Horrors (Keyboard 1) that won the 2020 Broadway World New Orleans Production of the Decade Award. She has performed at notable venues throughout North America such as The National Theatre (Washington, D.C.), Queen Elizabeth Theatre (Vancouver, BC), Playhouse Square (Cleveland, OH), and James M. Nederlander Theatre (Chicago, IL). As a coach and audition pianist, Mary Grace has worked with actors at the high school, undergraduate, and community theatre level.

A Louisiana native, Mary Grace's earliest musical experiences included listening to her father play the Blues and performing with school and church choirs. She credits growing up and participating in Louisiana's diverse music scene for developing her ability to perform in a multitude of styles including classical, rock/pop, and jazz. Mary Grace earned her Bachelor of Music degree in Piano Performance from Louisiana State University, under the tutelage of Gregory Sioles, Willis Delony, and Ana María Otamendi (collaborative piano). During her undergraduate studies, she had the opportunity to study abroad in Vienna, Austria where she studied collaborative piano with Carolyn Hague (MUK Wien); solo piano with Albert Sassmann (MDW Wien); chamber music; and Lied song. While in Austria, Mary Grace performed in recital as both a soloist and collaborative partner at the Palais Corbelli-Schöller. She has been in-demand as a wind ensemble and choral pianist, vocal coach, and recital partner with undergraduate and graduate level instrumentalists. She has worked with organizations such as the Detroit Symphony Orchestra (Civic Youth Ensemble) and the Ann Arbor Youth Chorale. In 2022, Mary Grace was the Collaborative Piano Fellow for the Cornish-American Song Institute, where she coached singers and performed duo and chamber music in Oxford and Falmouth, UK. She has performed in masterclass for artists such as Sholto Kynoch (Oxford Lieder Festival), Teressa Cahill, and Detroit Symphony Orchestra musicians. Previous engagements include performing on Interlochen Public Radio (NPR) and a recital at New World Symphony Truist Pavilion (Miami Beach, FL) with 2019 tuba fellow Evan Zegiel. 

Mary Grace is an advocate for new music and has performed world premieres of music for solo piano and chamber settings. She is a member of Barefoot Duo, a chamber ensemble focused on performing works by living composers for tuba and piano. Mary Grace's passion for new music often intertwines with her passion for helping the community. Most recently, she was the inaugural awardee of the Edward G. Powers Fund for Creativity award from the Arts Council of Greater Baton Rouge and a winner of the Michigan State University College of Music's Running Start Competition to commission, record, and digitally release a song cycle of Cajun French art songs (Quatre Chansons Cadiennes, Evan Snyder) for voice and piano to be premiered in 2023, in an effort to contribute to the broader revitalization and preservation movement of the Louisiana French language.  During the COVID-19 pandemic, Mary Grace planned and performed several benefit concerts to raise money for national and local organizations. Her livestreamed living room concert "Dinner Theatre: A Quarantine Cabaret" supported substance abuse and mental health organization To Write Love On Her Arms and IRIS, a domestic violence center in Baton Rouge, LA. In 2021, Mary Grace raised $1,400 for the Cajun Navy's Hurricane Laura relief efforts in Lake Charles, LA with her Zoom concert "To Lake Charles, With Love," a series of solo and remote collaborative recordings from musicians across the United States and the United Kingdom. 

​While touring across North America, Mary Grace can also be seen concertizing with her partner, tubist Dr. Evan Zegiel.