The $23 dress Kate Waterhouse swears by as a pregnancy essential.

When you’re in the latter stages of pregnancy, finding clothes that a) look stylish, b) comfortably accommodate your growing belly, and c) don’t cost the earth can be a challenge.

The bad news is, leaving the house in your flanno PJs isn’t always socially acceptable (though we’d never judge you for it).

The good news is, Kate Waterhouse has got your back.

The style blogger and journalist has ever-so-kindly shared the affordable pregnancy staple she’s loving right now on Instagram — a simple cotton T-shirt dress from ASOS Maternity.

Relaxed casual ???? new outfit post (including my pregnancy wardrobe essentials) now live on the blog (link in bio). ???? @hatrikkk . . Shop the look: on blog & http://⁠liketk.it/⁠2oGdY @liketoknow.it #liketkit . . #ootd #fashion #style #pregnacyfashion #maternityfashion #babybump #stylethebump #pregnancy @asos_au #asseenonme

A photo posted by Kate Waterhouse (@katewaterhouse7) on Jun 28, 2016 at 11:50pm PDT

Waterhouse is currently pregnant with her second child, and says the high-necked jersey shift has become her go-to.

“Anything stretchy is esssential to accommodate a growing bump and it’s also super comfortable, which is all I really want in anything I’m wearing the further along I get in my pregnancy,” she writes in a new blog post.

Her shade of choice: grey marle, which makes for a nice break from white or black.

“Grey marle has always been a reliable neutral for me as it goes with virtually everything, which makes pulling together an outfit even easier,” Waterhouse notes.

Watch: The five pregnancy symptoms nobody ever bothers to warn you about. (Post continues after video.)

In this particular ensemble, the 32-year-old has teamed her dress with a pastel pink Karen Millen jacket, Karen Walker sunglasses and Bianca Buccheri metallic shoes — and looks seriously cool.

Waterhouse says her Ralph Lauren bag is equally useful in the lead-up to baby number two.

“It leaves my hands free when I’m running errands and trying to get a million things done before the bub arrives,” she writes.

The ASOS dress is currently on sale for $23 down from $39, but only available in a size 14 — clearly, it’s a popular choice. (Post continues after gallery.)

If you don’t happen to wear a size 14, here are four similar affordable options to try:

1. Target Maternity Bodycon Dress, $29

Stripes are a basic, and don’t let anyone tell you differently. This cotton/elastane number has a similar design to Waterhouse’s, though its neckline is scooped. If stripes aren’t your thing you can also get it in black.

2. ASOS Maternity Curved Hem Dress, $44

Another high-necked cotton T-shirt dress, but this one has a curved hemline and comes in just one colour: navy. And who doesn't love navy?

3. Cotton On KN Tina Tshirt Dress 2, $19.95 (on sale)

This one isn't a maternity dress, strictly speaking, but it does have a relaxed fit that would happily accommodate a bump. There are also plenty of basic colours available, though not all are on sale (original price is $69.99).

Heads up: it's a mini design, so will sit a little shorter than Waterhouse's dress.

4. ASOS Maternity Stripe T Shirt Dress, $48.

Another stripey one, though the dropped shoulder design on this cream and navy dress adds a touch of interest.

Happy shopping, mums-to-be.

Is there a clothing staple that got you through pregnancy?

Featured image: Getty.