The characters of Hawk and Dove were first created by Steve Ditko and Steve Skeates in the pages of Showcase #75 (1968). At that point it was Hank Hall and his brother Don. This would be the team-up for 23 years until DC starting publishing Hawk & Dove Vol 2 #1 in 1988 from the creative minds of Karl Kesel, Barbara Randall Kesel, and Rob Liefled. The five-issue miniseries was some of Liefeld's earliest work, and since Don Hall has been killed, they introduced a new Dove in the form of Dawn Granger. This is the version of Hawk and Dove that we will see in the upcoming Titans series.
The photo shows us Alan Ritchson as Hank Hall and Minka Kelly as Dawn Granger. Ritchson may be best know to genre fans for his turn as Arthur Curry, AKA Aquaman, on Smallville, but he has also appeared in Blue Mountain State, The Hunger Games: Catching Fire, Hawaii Five-O, Black Mirror, and Blood Drive. Kelly comes from Friday Night Lights, Parenthood, Charlie's Angels, Almost Human, and Jane the Virgin.
When the image hit the web, Liefeld tweeted out his approval of the costumes. He says he is excited to see Dawn Granger and he's seen full turnaround on the costumes, and they look amazing. He also talks about how Akiva Goldsman and Geoff Johns had assured him they would look good months ago. Not sure about Ditko and Skeates, but Liefeld seems very happy.