Portia de Rossi joining "Scandal" for a "top secret" arc

Portia de Rossi attends the Oscars held at Hollywood & Highland Center on March 2, 2014, in Hollywood, Calif.

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Portia de Rossi is headed for a "Scandal"-ous return to TV.

The "Arrested Development" alumna has booked an arc on the hit ABC drama's fourth season.

The news was announced Wednesday via Twitter by de Rossi's wife, Ellen DeGeneres, who said the actress' role is a "top secret" one:

Multiple media outlets also confirmed the casting news.

"Scandal" returns on Thursday, Sept. 25 at 9 p.m. ET, sandwiched between "Grey's Anatomy" and the new series "How to Get Away with Murder."