Julia Elizabeth Wells was born in Walton-on-Thames, Surrey, England. Her early life was marked by a tumultuous family situation, with her mother marrying Ted Andrews, though her biological father remained unknown for many years. This early environment, while challenging, arguably contributed to her strong work ethic and resilience.

Under the tutelage of her stepfather, Ted Andrews, a vaudeville performer, Julia (soon to be known as Julie Andrews) began rigorous vocal training. She developed an extraordinary four-octave range, allowing her to perform challenging operatic arias and earning her the reputation of a child prodigy. This intensive training laid the foundation for her future success in musical theatre.