Casting for Hulu's upcoming Locke & Key is underway, and now the family has gotten a little bigger. According to Deadline, The Circle's Nate Corddry will play Duncan Locke, the Locke children's uncle.

Corddry is best known for his role as Dan in James Ponsoldt's techno-thriller The Circle. He is also known for playing Adam Branch on NBC's short-lived Harry's Law and Gabriel on the Chuck Lorre-helmed sitcom Mom. Corddry's character Duncan plays an important role in the comic's plot, possessing critical secrets about the nefarious goings-on in Lovecraft. Along with his boyfriend Brian Rogan, Duncan helps the Locke family settle into the family's old home after the murder of his older brother Rendell.

Corddry joins The Conjuring 2's Frances O'Connor, who stars as Nina Locke, as well as Jackson Robert Scott (It) and Megan Charpentier (Resident Evil: Retribution), who are playing Bode and Kinsey Locke respectively.

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Joe Hill and Gabriel Rodriguez's Locke & Key follows the macabre adventures of Tyler, Bode and Kinsey Locke in Lovecraft, Massachusetts. There, they discover a series of magical keys and are pursued by a demonic presence. Debuting in 2008 from IDW Publishing, the story was told over six story arcs and several one-shot issues. The series won an Eisner Award and earned several other distinctions.

Although Fox developed a Locke & Key pilot in 2011 that met a positive reception, the network passed on the show. Earlier this year, Hulu announced they were moving forward with an adaptation.

Hill and Carlton Cuse (Lost, Bates Motel, The Strain) will co-write the hour-long pilot. IDW Entertainment will produce alongside Cuse, Andy Muschietti, Barbara Muschietti and Lindsey Springer. The show will star Frances O'Connor as Nina Locke, Jackson Robert Scott as Bode Locke and Megan Charpentier as Kinsey Locke.