Dawn Olivieri is an American actress best known for her television roles as Lydia on the fourth season of the science fiction series Heroes and as Monica Talbot, as Marty Kaan's (Don Cheadle) ex-wife and competing management consultant - in the dark comedy series House of Lies.
Olivieri has appeared in top television projects, including How I Met Your Mother, Cold Case, Entourage, Las Vegas, Knight Rider, Stargate: Atlantis, Trust Me, and My Boys.
Throughout 2009 and 2010, Olivieri starred in the farewell season of the award-winning NBC series Heroes, which gave her national and international recognition. She also appeared on the hit series True Blood in the summer of 2010.
She was also seen on the hit CW series The Vampire Diaries, playing the love interest of Ian Somerhalder's character Damon Salvatore.