Born in Denver, Colorado, Lucio grew up in San Antonio, Texas, and graduated from John Marshall High School.

She is well known for the acting role of Lindsay Gardner on The O.C.. Lucio was later cast in the lead female role of the CBS television drama Moonlight (2007), but was replaced by Sophia Myles in April 2007.

Shannon Lucio took acting classes during her senior year of high school, which allowed her to discover her passion for performing.

After completing her secondary education, she applied to and was accepted at the University of Southern California (USC), where she earned a degree in theater[4].

Her personal life appears to play a significant role in her overall happiness, and she occasionally shares family moments on her social media accounts.