It’s the moment ‘Smallville’ fans have been waiting for. According to Deadline, actor Michael Rosenbaum, who plays Lex Luthor on the series, has signed an agreement tonight to return for the series finale in May.

The series has been pursueing his return since the actor left the show in 2008 to concentrate on his writing career.

Of his return Rosenbaum had this say, “I’m simply doing it for all of the fans out there who made Smallville the great success it is…I can’t wait to hug the old crew back in Vancouver one last time and see all of my old friends once again…Oh, and for Lex to become the badass he’s destined to be.”

‘Smallville’ showrunners Kelly Souders and Brian Peterson said, ” We couldn’t be more excited about having Michael back. And as far as the way he returns…there’ll be no doubt about how Lex becomes the great rival in Clark Kent’s life. He is the villain of the story.”

‘Smallville’ airs on Friday nights at 8/7c on the CW Network and is currently in it’s 10th and final season. The two hour series finale will air May 13, 2011.