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Katherine Heigl, Josh Kelley

INFphoto.com

Katherine Heigl's family tree is sprouting a new limb.

The Grey's Anatomy star, whose impending hiatus makes so much more sense now, is planning to adopt a baby with her singer-songwriter hubby Josh Kelley.

That's all her rep would confirm, but so what? Congratulations to the parents-to-be!

Heigl and Kelley swapped vows on Dec. 23, 2007 in Park City, Utah.

"I'm super excited to have a family," she told Extra at the time. "I've always wanted a family, a large family. [We'll wait] like, a year."

And what's a few months extra when you're planning for a lifetime?

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Aside from wanting to hear the pitter-patter of little feet, Heigl was obviously jonesing for a spot in our Hollywood's Hottest Moms gallery. Duh!