Born in Savannah, Georgia, to Ronald S. and Mary Agron,
Dianna was raised in San Francisco. Her father's family is
originally from Russia and their original surname,
"Agronsky", was altered by Ellis Island officials.
Agron's father is Jewish and her mother converted to
Judaism; Agron had a bat mitzvah. Agron spent her high
school years attending Burlingame High School in California.
As a teenager, she taught dance lessons. Agron has
appeared on television shows such as Shark, Close to Home,
CSI: NY, Numb3rs and a recurring role on Veronica Mars. She
then appeared as Harper on a 13-episode series of short
films called It's a Mall World, directed by Milo
Ventimiglia, and airing on MTV, and then on the second
season of Heroes as Debbie Marshall, the head
cheerleader/captain of the cheer squad at Costa Verde High
School, also with Ventimiglia. Dianna has also hosted a mini
Music Festival for 826LA in Los Angeles called Chickens in
Love.