Aaron Tveit has signed on to star in “BrainDead,” CBS’ upcoming comic-thriller set in Washington, D.C.

Tveit will play Gareth, the legislative director to a top Republican senator whose wit is only trumped by his pragmatism. He’ll appear opposite Mary Elizabeth Winstead, who plays a fresh-faced Hill staffer whose first job in D.C. leads her to discover two things: The government has stopped working, and alien spawn have come to Earth and eaten the brains of a growing number of congressmen and Hill staffers.

The series, which comes from “The Good Wife” creators Robert and Michelle King, received a straight-to-series order with 13 episodes and is set to premiere next summer.

“We’re thrilled that Aaron will be joining ‘BrainDead,'” said executive producers Robert and Michelle King. “We’re huge fans of his work — he’s spectacular on stage and screen — and think he’ll be a fantastic opponent-slash-love-interest for Mary Elizabeth Winstead.”

Tveit has seen his career blossom in recent years. In addition to starring in USA’s recently-cancelled “Graceland,” he will soon play Danny Zuko in Fox’s live staging of the musical “Grease.” He appeared in the film version of “Les Miserables” and on Broadway, originated the roles of Gabe in “Next to Normal” and Frank Abagnale, Jr. in “Catch Me if You Can.”

“BrainDead” is produced by CBS Television Studios. In addition to the Kings, exec producers are “Good Wife’s” Ridley Scott, David W. Zucker, Brooke Kennedy and Liz Glotzer for CBS Television Studios, Scott Free Productions and King Size Productions. Judy Smith will serve as co-executive producer. The series will be distributed domestically by CBS Television Distribution and worldwide by CBS Studios International.