Oh, baby!

A little over a month ago, Liv Tyler and her fiancé, David Gardner, welcomed a baby daughter, Lula Rose, and now Liv's taking to Instagram to prove just how adorable she is. The couple, who became engaged in 2015 after a year of dating, are already parents to one-year-old son, Sailor, as well as their two children from previous relationships, Milo and Gray.

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Liv, 39, shared the adorable image of David, 49, cradling their one-month-old daughter, on Instagram. "Three weeks ago today this happened," she captioned the pic. Just look at that face!

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💗 3 weeks ago today this happened 💗 @davidgardner

A post shared by Liv Tyler (@misslivalittle) on

But that's not all this mama of four is sharing on social media. She also posted a super cute snapshot of Gray and Milo doting on their newest sibling.

"And now this is happening!!!" Tyler wrote.

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💗💗 And now this is happening !!!!💗💗

A post shared by Liv Tyler (@misslivalittle) on

AWW! It's so cute to see their family not only growing, but bonding and welcoming the newest member of their little brood.

MORE: Liv Tyler Finally Confirms Her Engagement to David Gardner — See Her Gorgeous Ring!

Previously, The Lord of the Rings actress revealed she has big plans for expanding her fam with partner David. "I hope I will have more children," she admitted. "I'm 100 percent planning on it. If the stork could just drop it off on my roof, I'd be so happy. I'd have, like, 20."

Now that she's birthed two babies with her husband-to-be, we wonder if the couple has any more plans to have another.

Guess we'll have to wait and see!