Marilyn Jane "Mariah" Bruno (born September 29, 1991) is the eldest daughter of John Bruno and Denise Bruno & the older sister of Taylor Bruno, Isabella Bruno and Samantha Bruno. She was born with cerebral palsy and to live long after birth. She also required daily physical therapy from her mother. When Jo visited the Bruno family, Mariah revealed that she wanted to spend more time with her dad. She had a few seizures during therapy when Lynne held her.
She was 15 years old when she appeared on Supernanny. She is now 27. She and Samantha and Isabella have a niece named Noelle (Taylor's daughter) who is 6 years old.