Mariah grew up in Seattle in a musical family with too many pets. She was homeschooled but still claims to have had friends. Her interest in musical theatre was piqued when she was tall enough to stand next to her violinist parents and watch the front half of shows from the orchestra pit.

Mariah received her BFA in Musical Theatre from Rider University and is now based in NYC. She is also a classically trained pianist, and folk/indie pop singer-songwriter.