Tom Mison is returning to TV, but he's moving to HBO.

The Sleepy Hollow star is the latest to join Damon Lindelof's Watchmen pilot for the premium cable network, according to TV Line. HBO and the producers are still keeping very quiet about character descriptions for the new series but the A-list cast already includes Jeremy Irons, Regina King, Don Johnson, Louis Gossett Jr., Tim Blake Nelson, Adelaide Clemens and Andrew Howard. Watchmen marks Mison's first TV role since Sleepy Hollow ended after four seasons last March.

Fans are extremely interested in the project since Lindelof announced that it won't be a strict adaptation of Alan Moore's iconic graphic novel, but an original story inspired by Moore's work. Comic book fans already lost it over the announcement that the show will be set in modern times, though it will still be a world where superheroes are considered outlaws.

Watchmen: Regina King, Don Johnson, Louis Gossett Jr. and More Join HBO Reboot

Zack Snyder helmed the film adaptation of the graphic novel which was released in 2009 to middling critical reception and a low box office score. Snyder was originally in talks to handle the TV adaptation for HBO as well until Lindelof stepped in last June. The TV version is still in its pilot phase which HBO will use to decide if it wants to bring the show to series — but with a cast like this how could it not?

Tom Mison, <em>Sleepy Hollow</em>Tom Mison, Sleepy Hollow