Her first child, Maggie was born in 2008. Erinn gave birth to her second daughter, Lilah Grace Hayes, on April 29, 2009.
Erinn is married to Jack Hayes who is a construction superintendent.
Erinn is right-handed.
She is 5'9" (1.75 m).
Several interests of Erinn's include cooking, gardening, reading, playing volleyball, golf, snowboarding and doing yoga.
According to commentary on the 4th season CSI DVD, Erin was called in to audition for a role on CSI: Crime Scene Investigation and bore such a striking resemblance to the show's lead actress, Jorja Fox, that the directors called her back for a later episode where the resemblance was pivotal to the storyline.
As of 2006, she lives in Los Angeles, California.
She graduated from the University of Colorado in 1998.
She began her career as a regular on the sketch comedy show On the Spot.