EXCLUSIVE: 'Grey's Anatomy' Star Caterina Scorsone Pregnant With Second Child: We're 'Very, Very Excited'

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Congratulations are in order for Caterina Scorsone!

The Grey’s Anatomy star is expecting her second child with husband Rob Giles, Scorsone confirmed to ET at the Disney/ABC Television Critics Association party at the Beverly Hilton on Thursday. The couple are already parents to daughter Eliza, who they welcomed in July 2012.

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"I am!" the 34-year-old actress told ET, adding that she and her husband are "very, very excited" for their new bundle of joy.

Scorsone showed off her baby bump with a figure-hugging long-sleeved black collared dress and revealed that she’s due in the middle of production.

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"It'll be challenging. It's going to happen somewhere during the shooting season," she said. "But Shondaland is the best place for that to happen."

When asked if she knew if she was having a boy or a girl, Scorsone said they're keeping that a secret: "Yeah. We're kind of not [saying]."

She revealed that her real-life pregnancy will not be written into Amelia’s storyline on Grey's Anatomy. Since viewers last saw Amelia, she was getting hitched to Owen (Kevin McKidd).

"I don't think so. We're picking up the season immediately after we left off, which was the wedding where Amelia was not pregnant," she said with a laugh, adding there will be some "very fancy footwork for the director of photography."

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Scorsone was in good spirits about it all, joking that she’ll be wearing more "lab coats" come fall.

As for what season 13 entails, she promised fans will be in for a real treat.

"There is a new living situation with Amelia," Scorsone said. "It's going to be fascinating on a lot of different levels. Owen and Amelia, they got married really fast, and marriage is like a seismic shift in a person's life, let alone two people who are coming to the table with deep wounds and scars, so I think negotiating that transition into inter-dependent life is going to be dramatic and challenging. We'll see how that goes!"

"So far, it's actually pretty sexy," she said of Owen and Amelia’s relationship, "but I imagine -- just knowing Shondaland and knowing life -- that they're going to have to figure their stuff out."

Grey's Anatomy returns Sept. 22 on ABC. 

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