O’Connor will portray family matriarch Nina Locke, who moves her three children to Maine after her husband is brutally murdered.
Hulu (via The Hollywood Reporter) has begun locking in the Locke & Key series cast with the addition of Australian actress Frances O’Connor (A.I. Artificial Intelligence, The Conjuring 2) as the female lead in the pilot.
Locke & Key has had a long history of making it to another medium with Dimension Films purchasing the rights in 2008.
Carlton Cuse (The Strain, LOST) set to executive produce and showrun the series, based on the IDW Entertainment comic series written by Joe Hill with art by Gabriel Rodriguez.