Eion Bailey grew up in the Santa Ynez Valley of California. His father owned a small airline service which flew people around the state. Eion tagged along on flights and his father gave him flying lessons after dropping off passengers. His first lesson was at the age of twelve. When not flying or playing baseball, Eion and his friends frequented Solvang, a small tourist town nearby. He struggled in school until he found his calling in his high school drama department. Eion was soon performing in each school play and went on to study formally at the American Academy of Dramatic Arts in New York City.

He appeared in a cameo role in Cameron Crow's "Almost Famous", portraying Rolling Stone editor Jann Wenner. Bailey was also seen in "Center Stage," "Fight Club," Catherine Jelski's "The Young Unknowns.", "The Scoundrel's Wife," "Seven and a Match," Renny Harlin's "Mindhunters" for Miramax, and the independent feature "Sexual Life" for director Ken Kwapis. Bailey's TV appearances include "Signigicant Others," "Dawson Creek," HBO's highly acclaimed series, "Band of Brothers" produced by Tom Hanks and Steven Spielberg, and the HBO original film "And Starring Pancho Villa as Himself" opposite Antonio Banderas.

On stage, Bailey has appeared in Peter Schaffer's classic psychological drama, "Equus," at the Pasadena Playhouse, as well as "Spoon River Anthology," "Look Homeward, Angel," and "Dinner at Eight" at the American Academy of Dramatic Arts, "Desire and I" at the Access Theatre Santa Barbara, and "Icarus' Mother" at the SBCC Studio Theatre.
Attended Santa Barbara City College Screen tested for the title role in Batman Begins, but lost the role to Christian Bale He plays a medical student in both the movie "Center Stage" and the television show "ER". Is roommates with Band of Brothers cast-mate, Matthew Settle.