The new NBC drama - from JJ Abrams (Lost) and Eric Kripke (Supernatural) - is set in a future world in which all forms of energy have mysteriously ceased to exist.
Sebastian's character - the wife of computer genius Aaron (Zak Orth) - will appear in flashbacks, Deadline reports.
Her previous credits include guest roles on Gossip Girl, Person of Interest and Hart of Dixie.
Billy Burke (Twilight), Tracy Spiridakos (Being Human), David Lyons (The Cape), Giancarlo Esposito (Breaking Bad) and Elizabeth Mitchell (Lost) will also star in Revolution, which debuts September 17 on NBC in the US.
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Watch a promo for Revolution below: