Stephanie D'Abruzzo is an American actress, singer, and puppeteer. She originated the roles of Kate Monster and Lucy the Slut in Avenue Q and stayed in the roles for two and a half years into their Broadway run.

She has many credits in the puppetry world, including walk-on characters and principals such as Curly Bear, Lulu, Elizabeth, and Googel Monster on Sesame Street. She also has puppeteered for The Book of Pooh (Kessie), The Wubbulous World of Dr. Seuss and more.