Speed is the second of two children born to Sue (née Salter) and Sid Speed, having an older brother, Dan. Her career in performing began at the age of seven after her ballet teacher saw potential and advised her parents to get her an agent.
Speed, the second child of Sue (née Salter) and Sid Speed, has an older brother named Dan. She started her career in performance at age seven after a ballet instructor recognized her talent and suggested her parents enroll her with an agent.