The genre favorite has been added to the main cast for The CW's comic-book drama.

Malcolm Merlyn is sticking around on Arrow.

John Barrowman has been promoted to series regular for season three, The Hollywood Reporter has confirmed.

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Barrowman was first introduced as Malcolm/Dark Archer in the fourth episode of the first season and had appeared in a few episodes in the sophomore run, with the final two hours setting up his new arc.

The news comes after the finale featured Barrowman's Malcolm bringing Oliver's sister Thea under his wing, teeing up a potential new dynamic for father and daughter.

Stephen Amell teased the news Thursday on Twitter with a candid photo of himself and Barrowman at the network's annual upfront presentation in New York.

Barrowman joins an ensemble that includes Amell, Katie Cassidy, David Ramsey, Colton Haynes, Willa Holland, Paul Blackthorne and Emily Bett Rickards.

Arrow will return in the fall at 8 p.m. Wednesdays.

Email: Philiana.Ng@THR.com

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