"ER" veteran Ming-Na has signed on for another acronym-driven project.

Ming-Na, who starred on the medical drama "ER" for nine years, has signed on for "Marvel's S.H.I.E.L.D." pilot, which will be written by "Avengers" writer-director Joss Whedon, his brother Jed Whedon and Maurissa Tancharoen ("Dollhouse").

The pilot revolves around the titular peace-keeping force featured in Marvel comics and the movies that they spawned, including "The Avengers."

Also read: Clark Gregg Returning for "Marvel's S.H.I.E.L.D." — Coulson Lives!

Ming-Na will play agent Melinda May.

Whedon will also executive-produce the project along with Jed, Tancharoen, Jeffrey Bell and Jeph Loeb of Marvel Television if it goes into production, and is attached to direct, schedule permitting.

"The Avengers" actor Clark Gregg, who played Agent Coulson in the big-screen superhero epic, has also signed on for the pilot, which comes via ABC Studios and Marvel Television.

Ming-Na's other recent television work includes runs on "Two and a Half Men," as well as the sci-fi offerings "SGU Stargate Universe" and "Eureka."