Titans

Actor Alan Ritchson has been cast as half of duo Hawk, this isn't the first time his played a DC character Aquaman in the tv show Smallville. He also was the voice of Raphael in the Teenage Mutant Ninja Turtles movies.
Dove the female half hasn't been announced yet.

Actress Minka Kelly has been cast as the DC Comics character Dove.

Fringe Director Brad Johnson has been reported to be directing the pilot.

Actor Ryan Potter has been cast as Garfield "Gar" Logan, aka Beast Boy,

First pic from the show of Actor Brenton Thwaites as Dick Grayson but in the Robin costume. Hopefully we’ll see him as Nightwing.

Another look at the Robin suit.

Looks like there stepping up another casting could this Be Donna Troy aka Wonder Girl?
[RUTH GIBBS]Female, 20s, “Caucasian or Latina or Middle Eastern, or ethnically ambiguous. Confident and kick ass. Educated. RECURRING GUEST STAR THIS SEASON WITH AN OPTION FOR SERIES REGULAR NEXT SEASON.”

First look at Hawk and Dove.

Geoff Johns has confirmed that The Doom Patrol from th comics will be appearing in the show.

It’s being rumoured that actress Conor Leslie has been cast as Donna Troy/Wonder Girl.