Since 2006 Regan has appeared in several movies and television shows. Her filmography includes The Wedding Album, Blinders, Supreme Courtships, The Babysitters, and the Sex and the City movie. She also had guest appearances on the TV shows Love Monkey, Law & Order: Criminal Intent, American Experience, Six Degrees, The Black Donnellys, and New Amsterdam.
In 2008, Regan began filming Legend of the Seeker, a television show based on Terry Goodkind's Sword of Truth series. She portrayed Mother Confessor Kahlan Amnell. In 2009, Regan ventured into producing with Camp Wanatachi, a musical that ran in New York at La MaMa Experimental Theatre Club.
She was cast as a lead on the proposed television series The Frontier created by Shaun Cassidy. In 2013, Regan began a recurring role in the fifth season of the USA Network crime drama White Collar as Rebecca Lowe, a brief love interest of Neal Caffrey.
Born in San Diego County, California, Regan grew up in an Irish American and Catholic family. She began acting as a child in North County productions of The Wizard of Oz at the La Paloma Theatre and Joseph and the Amazing Technicolor Dreamcoat in her hometown of Carlsbad, California. Regan graduated from the University of North Carolina School of the Arts.
Her natural hair is red and curly. She dyed her hair dark brown and chemically straightened it for Legend of the Seeker. Regan is married to Eamon O'Sullivan, an assistant director she met in New Zealand while filming Legend of the Seeker. On December 27, 2010, Regan gave birth to their daughter Frankie Jean. The news was revealed via Twitter two days after the birth. She welcomed her second child, a son, in August 2018.
- Graduated from University of North Carolina School of the Arts.
- She has one daughter, Frankie Jean, with her husband, Eamon O'Sullivan.
- Studied Drama with Gerald Freedman at the North Carolina School of the Arts.
- She began acting as a child in productions of 'The Wizard of Oz,' 'Annie' and 'Joseph and the Amazing Technicolor Dreamcoat' at the La Paloma Theatre in Encinitas, California.
- Produced the new musical "Camp Wanatachi" at the La MaMa Theater in New York City in 2011.
- She was born and raised in Carlsbad, California.
- She attended San Dieguito Academy High School in Encinitas, California.
- Her ancestry is Irish.
- She received her BFA from North Carolina School of the Arts.
- She was on Broadway in the original cast of "Is He Dead?" directed by Michael Blakemore, written by Mark Twain and adapted by David Ives at the Lyceum Theater.
|2007||The Babysitters||Tina Tuchman|
|2008||Sex and the City||Hostess|
|2010||The Best and the Brightest||Robin|
|2006||The Wedding Album||Kate||TV pilot|
|2006||Love Monkey||Woman||Episode: "Pilot"|
|2006||Law & Order: Criminal Intent||ADA Claudia Shankly||Episode: "Masquerade"|
|2007||Law & Order: Criminal Intent||ADA Claudia Shankly||Episode: "Silencer"|
|2007||Six Degrees||Diana Foss||Episode: "A Simple Twist of Fate"|
|2007||American Experience||Angelica Shippen||Episode: "Alexander Hamilton"|
|2007||The Black Donnellys||Trish Hughes||(4 episodes)|
|2007||Supreme Courtships||Holly||TV film|
|2008||New Amsterdam||Daphne Tucker||Episode: "Keep the Change"|
|2008–2010||Legend of the Seeker||Kahlan Amnell||Main role (44 episodes)|
|2011||NCIS: Los Angeles||Elizabeth Smith||Episode: "Cyber Threat"|
|2011||Hide||Annabelle Granger||TV film|
|2011||Person of Interest||Wendy McNally||Episode: "Number Crunch"|
|2012||The Frontier||Hannah Strong||TV pilot|
|2012||Perception||Victoria Ryland||Episodes: "Shadow", "Light"|
|2013||Murder in Manhattan||Lex Sutton||TV film|
|2013||Beauty and the Beast||Alex Salter||(4 episodes)|
|2013||Sons of Anarchy||Escort||Episode: "Straw"|
|2013–2014||White Collar||Rebecca Lowe/Rachel Turner||(9 episodes)|