NEW YORK (AP) ? The cast of the Carole King musical on Broadway is getting a super addition. "Supergirl" star Melissa Benoist will make her Broadway debut this summer when she steps into the title character of "Beautiful: The Carole King Musical," The Associated Press has learned. Benoist, who was on "Glee" and the miniseries "Waco," starts June 7 for a run through August 4.