The actress teased a new project she's been working on with musician husband Josh Kelley on Instagram and Twitter Sunday.
Heigl, 37, informed fans of her venture with sexy photos of herself modeling in white lingerie from Los Angeles fashion brand For Love & Lemons.
"Been working on a secret project with @joshbkelley. The clock's ticking! Stay tuned... #ItsYourMove," she captioned a snap of the married couple snuggling in bed.
The former Grey's Anatomy star previously created the Katherine Heigl Collection of medical scrubs. Influenced by her role as Izzie Stevens, Heigl lent her name and likeness for the 30-day launch back in 2007.
Heigl and Kelley – who wed in 2007 – are parents to daughters Nancy, 7, and Adalaide, 3.