Amanda is the daughter of Rick Bynes and Lynn Organ. Her father is a dentist, while her mother is a dentist assistant and office manager. She was raised alongside her older siblings, Tommy Bynes and Jillian Bynes.
The American actress is 37 years old as of March 2024. She was born on 3 April 1986 and hails from Thousand Oaks, California, United States.
Amanda is of mixed ethnic background, with her mum being Jewish and born into a Canadian couple whose families were Polish, Russian, and Romanian. Her father is of Irish, Polish and Lithuanian descent.