Ali Fedotowsky's newborn daughter was born with a built-in big brother — The Bachelorette alum's adopted dog Owen!

The 31-year-old new mom celebrated her furry companion's third birthday on Instagram with an adorable photo of the rescue pup with her baby girl Molly sleeping nearby.

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"You will always be our 1st baby," the blonde beauty wrote. "Thank you for being the best big brother to Molly. She's so lucky to grow up with such a good poochie like you!"

The reality star has been documenting the cute duo on Snapchat since she brought her newborn daughter home, and they are inseparable!

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She continued, "Little Molly partied hard with Owen this morning so now she's passed out."

Too cute! To see more Bachelor Nation couples with buns in the oven, check out the gallery below!