Sleepy Hollow star Tom Mison, as well as Frances Fisher and Jacob Ming-Trent, have joined the cast of HBO's Watchmen pilot, according to Deadline. Their roles were not specified.
In addition to his leading role in Sleepy Hollow, Mison co-starred in Salmon Fishing in the Yem and the HBO/BBC joint production Parade's End.
Fisher is best known for her roles in ABC's The Edge of Night and as the mother of Kate Winslet's character in Titanic.
Jacob Ming-Trent appeared in Sony's recent Superfly remake, and appeared in Showtime's White Famous.
Filming is already underway on the Watchmen pilot, with a growing cast that reportedly includes Don Johnson, Jeremy Irons, Regina King, Tim Blake Nelson, Louis Gossett Jr., Adelaide Clemens, and Andrew Howard.
Showrunner Damon Lindelof has stated that HBO's Watchmen won't be a direct adaptation of Alan Moore and Dave Gibbons' original comic book series.
HBO has not set a debut date for Watchmen.