Rachelle seems to be following in Lea Salonga's footsteps after making her debut as Gigi in Miss Saigon. Lea played Eponine then Fantine in Les Miserables after her Miss Saigon stint. The role of Fantine also gave Anne Hathaway an Oscar for Best Supporting Actress in 2013.
In her Instagram post, the singer has been awake for more than 24 hours, still in disbelief about landing the role.
"DREAM big and it will happen, still can't believe it," she stated.
Rachelle takes the stage on June 15, 2015.