A casting search is underway for what will be a recurring role on The CW drama.

The CW is bringing in a familiar foe in season four.

Iconic character Lex Luthor will be introduced in the current season of the DC Comics-inspired drama starring Melissa Benoist. Casting for what will be a recurring role is underway. The character was last seen on the former WB Network turned CW's Smallville played by Michael Rosenbaum.

"We're beyond excited to introduce iconic villain Lex Luthor to Supergirl and to weave him into our story this season," exec producers Robert L. Rovner and Jessica Queller said in a joint statement Thursday. "We've talked about having Lex on the show since its inception, and we're excited to have him finally arrive. We can't wait for him to shake things up in National City and watch him go toe to toe with not only Supergirl, but his sister, Lena Luthor (Katie McGrath)."

The addition of Lex Luthor arrives as Supergirl — which now airs as part of The CW's Sunday night scripted originals — is bringing back Superman (Tyler Hoechlin) and introducing Lois Lane (played by Grimm's Elizabeth "Bitsie" Tulloch). While Lois Lane and Superman will return for the December Arrow-verse crossover, Lex will not be included in the annual event.

Other actors who have taken on the role of Lex Luthor include Scott James Wells, Sherman Howard, John Shea on the small screen and Lyle Talbot, Gene Hackman, Kevin Spacey and Jesse Eisenberg on the big screen.