Elizabeth Mitchell is returning to TV!

The Lostand Valum has joined the cast of NBC's new drama Revolution as a series regular, TVGuide.com has learned.

From Eric Kripke, J.J. Abrams and Bryan Burk, Revolutionfollows a group of characters struggling to survive and reunite with loved ones in a world where all forms of energy have mysteriously ceased to exist. Mitchell will portray Rachel Matheson, the mother of Charlie (Tracy Spiridakos) and Danny (Graham Rogers).

NBC announces fall premiere dates

Andrea Roth was previously cast in the role before the producers decided to revamp her character. Mitchell's Rachel will appear on the series in flashbacks, whereas Roth appeared in present day.

Mitchell is best known for playing Juliet Burke, an Other, on Lost and FBI Agent Erica Evans on V. Her other credits include ER, Gia and Law & Order: SVU.

NBC's new drama — also starring Giancarlo Esposito, Billy Burke, David Lyons, Tim Guinee, JD Pardo, Zak Orth and Anna Lise Philips, whose character is expected to be phased out — will premiere Monday, Sept. 17 at 10/9c on NBC.