For the first 16 years of her life, Webb lived in Woodbridge, VA, a town of 50,000, just outside Washington D. C.
She is the middle child of 6 with a younger sister, two younger brothers and two older sisters.
In 2001 she and several members of her family moved to San Diego, California. Haley enrolled at La Costa Canyon High School.
She dreamed of being a ballerina or a backup dancer and performed in a number of high school productions. She was captain of the dance team and earned a black belt in Tae Kwon Do.
While competing in the 2003 'Talent America Showcase,' she met casting director/manager Gary Shaffer of Upstart Management who was judging the event.
Shaffer recognized her talent and urged her to move to Los Angeles which she did later that year. Once there, Webb studied with acting legend, Howard Fine.
She also took a master class with JoAnne Baron & D. W. Brown in 2006. A week and a half after finishing the class, she landed her first television role, a guest spot on the CBS legal drama series Close to Home.
She booked her first big movie role in 2009 in the horror/thriller The Final Destination as Janet Cunningham.
She did a number of short films and a few one episode appearances on TV before booking her first recurring role on television in MTV’s Teen Wolf.
In 2012, she made her directorial debut in the short film Patti, about the life and work of musician Patti Smith, in which she played the eponymous role and served as producer, film editor, set decorator, sound editor, and costumer.