The yoga instructor and her actor husband revealed that they get emotional whenever they step inside the pink and blue-decorated room they have prepared for their baby girl.
"We have shed tears when we come in here because it makes it real," said Hilaria, speaking to Extra TV who filmed the visit.
Hilaria and Alec knew exactly what they wanted for their little girl's room, and hired interior designer Daniel Romanoff to bring their ideas to life. "@dannydeemsit is one special interior designer!!" she tweeted before the episode aired.
"Hilaria really had a vision for a soft and sweet room — she wanted butterflies and Alec had ideas as well," said Daniel.
The health and fitness fanatic has even bought mini yoga mats for her baby, and is keen for her daughter to follow suit.
"She is going to be starting at an early age," said Hilaria, showing off the mats.
The well-prepared mother-to-be has filled the cupboards with baby designer clothes and shoes, many of which are white or pink, and arranged the items in size order to tailor for her baby's growth. Earlier this month Hilaria tweeted photos of her husband posing with some of the adorable outfits.
The nursery includes a white crib and rocking chair nearby, with a matching pink blanket draped over it. The light blue walls have been decorated with fluttering pink butterflies and frames of blossoming flowers.
Cuddly toys of little lambs, bears and bunnies have been dotted around the room for the couple's baby to snuggle up to. Hilaria has also picked out several baby books, and showed off one about little creatures.
Hilaria and Alec's first daughter will be the second child for the 30 Rock actor. He already has a 17-year-old daughter Ireland Baldwin with ex-wife Kim Bassinger.