It's a baby girl for Mean Girls actress Lacey Chabert!

The brunette beauty gave birth to her and hubby David Nehdar's first child, daughter Julia Mimi Bella, on Sept. 1, she told fans on Instagram.

“'And then my soul saw you and it kind of went, Oh, there you are. I’ve been looking for you,'” the 33-year-old wrote next to a photo of her newborn.

“#TBT to the best day of my life. One week ago I became a mom to this precious angel… Julia, you are my heart’s deepest dream come true. I love you more than I could ever say. Welcome to this big beautiful world sweet girl!”

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Ever since announcing her pregnancy in February, Lacey has been treating social media followers to baby bump pics as well as sneak peeks inside her daughter's nursery, which features pink, cream and gray hues.

Congrats to the happy couple!