It's been known for some time now that Damon Lindelof's sequel to Before Watchmen had cast Jeremy Irons but it wasn't until now that we knew he would be playing Ozymandias, a character that was explored in 2012's six issue mini-series Before Watchmen: Ozymandias written by Len Wein and drawn by Jae Lee.
Also joining the project is Jean Smart (Fargo, Legion) as FBI Agent Blake. Of note is Blake is also the surname of The Comedian, so her character could have ties back to him.
The HBO series stars Regina King, Jeremy Irons, Don Johnson, Tim Blake Nelson, Louis Gossett Jr., Yahya Abdul-Mateen II, Adelaide Clemens, Andrew Howard, Tom Mison, Frances Fisher, Jacob Ming-Trent, Sara Vickers, Dylan Schombing, Lily Rose Smith, and Adelynn Spoon. It's set to release in 2019.