Congrats, Jessica Capshaw!

On Monday, Dec. 7, the 39-year-old Grey's Anatomy actress took to Instagram to reveal she and her husband, Christopher Gavigan, are expecting their fourth child together — and we can't get over how adorable their pregnancy announcement is!

"The holidays have certainly arrived… All of our lives are being added to by the lights, music and the cheer!" Jessica captioned the sweet snapshot of herself posing with her handsome hubby and three children. "This year our family has reason to further broaden our smile… baby number four is on the way! I am a lucky, lucky girl."

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Jessica and Christopher — who tied the knot in 2004 — are already parents to a son, Luke, 8, and two daughters, Eve, 5, and Poppy, 3.

Click through the gallery below to see the cast of Grey’s Anatomy then and now!