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Dawn Olivieri (born February 8, 1981) is an American actress perhaps best known for her turn as Lydia in Heroes and Monica Talbot in House of Lies. She has appeared in the Showtime series House of Lies for 41 episodes, starting in 2012, playing the competitive management consultant and ex-wife of main character Marty Kaan and mother of their son, Roscoe Kaan. She acted as Janice Herveaux in the third season of the HBO series True Blood. She played a reporter and Damon Salvatore's girlfriend Andie Star in the hit CW show The Vampire Diaries. Wrapping up the 4th season on Heroes, she has also completed parts on TBS's My Boys, NBC's Knight Rider, TNT's Trust Me, and SyFy's Stargate: Atlantis, and recurred on CBS's How I Met Your Mother. Olivieri played a lead role in the SyFy movie Hydra, and she is the voice of Pepper Potts in the new Avengers animated series on Disney XD. She appeared in the October 2009 issue of Maxim. Olivieri appeared on HBO's Entourage on September 13, 2009, and hosted a contest on Scripped. She voiced Lucy Kuo in a PlayStation 3 video game, inFamous 2, which was released in June 2011. As of March 2018, she has a recurring role on SEAL Team as Amy Nelson.

Known For

7.1

Angel

Hostile Takeover

2025

6.3

Jenna Ross

Homestead: The Series

2024

6.5

Jenna Ross

Homestead

2024

8.0

Amber Whalen

Lioness

2023

6.6

Ask

Double Threat

2023

8.3

Claire Dutton

1883

2021

7.7

Melina Devlin

NCIS: Hawaiʻi

2021

3.2

Adrian / Nicole

The Secret of Karma

2020

7.1

Dani Toretti

The Hot Zone

2019

8.3

Sarah Atwood

Yellowstone

2018

Credits

Hostile Takeover

as Angel

2025

7.1

Homestead: The Series

as Jenna Ross

2024

6.3

Homestead

as Jenna Ross

2024

6.5

Lioness

as Amber Whalen

2023

8.0

Double Threat

as Ask

2023

6.6

1883

as Claire Dutton

2021

8.3

NCIS: Hawaiʻi

as Melina Devlin

2021

7.7

The Secret of Karma

as Adrian / Nicole

2020

3.2

The Hot Zone

as Dani Toretti

2019

7.1

Yellowstone

as Sarah Atwood

2018

8.3

Darc

as Ivy

2018

6.1

Traffik

as Cara

2018

6.1

Den of Thieves

as Debbie O'Brien

2018

6.9

Bright

as Sherri Ward

2017

6.2

SEAL Team

as Amy Nelson

2017

8.0

A Change of Heart

as Laurie

2017

1.5

He Does Not Want Peace

as Jeannie Deline

2016

8.0

Lucifer

as Lt. Olivia Monroe

2016

8.4

The Last Witch Hunter

as Danique

2015

6.0

Rosewood

as Agent Harrows

2015

6.5

To Whom It May Concern

as Anna

2015

5.6

Secrets and Lies

as Detective Felicia Sanchez

2015

7.3

Supremacy

as Doreen

2014

5.7

American Hustle

as Cosmo Girl

2013

6.9

Plush

as Annie

2013

5.5

Missionary

as Katherine Kingsman

2013

5.0

House of Lies

as Monica Talbot

2012

6.6

Boy Toy

as Kylie

2011

4.1

The Vampire Diaries

2009

8.3

Hydra

as Gwen Russell

2009

4.2

Xtra Credit

as Lexy

2009

4.3

True Blood

as Janice Herveaux

2008

7.6

Californication

as Actress Karen

2007

7.6

Rules of Engagement

as Cheyenne

2007

7.1

Devil's Den

as Jezebel

2006

4.4

Heroes

as Lydia

2006

7.5

How I Met Your Mother

as Anna

2005

8.1

Veronica Mars

as Maggie

2004

7.8

The Player

2004

0.0

Entourage

as Clothing Girl

2004

7.4

Stargate Atlantis

as Neeva Casol

2004

8.0

Las Vegas

as Brunette Bombshell Sheri

2003

7.0

CSI: Crime Scene Investigation

as Stripper

2000

7.6