The Source Code actor will feature in multiple episodes as a flirtatious professor, according to TV Line.
The character will serve as a love interest for Owen (Dallas Roberts), brother of Alicia Florrick (Julianna Margulies).
Arden previously played a recurring role on NBC drama Kings and also starred in short-lived Fox sitcom The Return of Jezebel James opposite Parker Posey and Lauren Ambrose.
His other television credits include guest spots on Grey's Anatomy, The Closer and Bones.
Former House star Lisa Edelstein will also recur in the new season of The Good Wife, while Kelli Giddish will reprise her role as Sophia and Matt Czuchry (Cary) will have an expanded role.
The Good Wife returns to CBS on September 25.
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Watch a clip from The Good Wife's second season finale below: