Liv Tyler's Best Maternity Style Outfits

Angela Pham/BFA/REX/Shutterstock; Nick Harvey/REX/Shutterstock; Curtis Means/ACE/INFphoto

Happy birthday, Liv Tyler! The pregnant star turns 39 years old today, and as a soon-to-be mom-of-three, she has maternity style down to a science.

Ever since she announced her third pregnancy back in January, we’ve been awed by the model and actress’s baby bump-bearing looks. From showing off her red carpet style prowess in an off-the-shoulder cobalt blue gown at London Fashion Week to expertly demoing how to turn overalls into a flattering maternity look, Tyler knows just how to style her growing bump while staying totally comfortable.

Back in February, the star told InStyle the secret to her success: menswear. “I generally try to find the pieces in my wardrobe that I could stretch out for as long as possible, like a great men’s button-down shirt in a big size,” she suggested.

“Even if I want to just wear sweatpants or a sweatshirt—I went to James Perse the other day and got, like, a large men’s sweatshirt and it looks great. Or I’ll just wear black tights and boots, and sort of an oversized shirtdress.”

RELATED: Liv Tyler's Changing Looks

In honor of her 39th birthday, we’ve rounded up her 13 best maternity looks since announcing her third pregnancy. Keep scrolling for some serious outfit inspiration.

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1 of 14

June 23, 2016

Christopher Peterson/Splash News

The pregnant actress hugged her bump in a black-and-white patterned dress with a black cardigan, oversize sunglasses, and strappy orange sandals after lunch with dad Steven Tyler in N.Y.C.

2 of 14

May 25, 2016

Elder Ordonez/INFphoto.com

The expectant star dressed her growing bump in a pair of overalls for a day out in N.Y.C. She wore the piece with a printed shirt underneath, teaming the ensemble with black Converse sneakers, a black jacket with gold button detailing, a printed scarf wrapped around her neck, and a pair of simple black sunnies.

3 of 14

May 23, 2016

FameFlynet Pictures

To run errands in N.Y.C., the actress donned a leopard print tunic over black leggings. She completed her look with a black-and-white scarf, dark sunnies, cute scalloped black flats, and a matching leather bag.

4 of 14

May 3, 2016

Theo Wargo/Getty Images

For a charity event, the expectant star donned a black sleeveless dress that featured a high neckline and long hem. To complete the winning look, she draped a camel-colored coat over her shoulders and added a pair of chic leather sandals.

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May 1, 2016

Angela Pham/BFA/REX/Shutterstock

Tyler wore a sheer black top with silver piping, black skinnies, and scalloped flats for a fundraiser in Brooklyn, N.Y.

6 of 14

April 28, 2016

Curtis Means/ACE/INFphoto

The pregnant celeb was all smiles as she stepped out in New York City, leaving her West Village apartment in sunnies, a black top, and a pair of cropped distressed denim overalls that cradled her belly.

7 of 14

April 25, 2016

AKM-GSI

Tyler was spotted running errands in N.Y.C. in a chic all-black ensemble.

8 of 14

April 12, 2016

Splash News

The expectant mom paired a black silk onesie with classic Adidas superstar sneaks, a hooded camel coat, bright orange purse, and black-and-white patterned umbrella for a rainy day outing in N.Y.C.

9 of 14

February 24, 2016

Beretta/Sims/REX/Shutterstock

The star stepped out in London in a polka dot mini, black coat, and tights. She accessorized with lace-up black boots, tortoise-shell sunnies, and an over-the-shoulder bag.

10 of 14

February 23, 2016

Nick Harvey/REX/Shutterstock

Tyler glowed on the red carpet in her sleek off-the-shoulder cobalt blue Stella McCartney gown that hugged her growing bump.

11 of 14

February 17, 2016

Ben Gabbe/Getty

The gorgeous mom looked radiant for Proenza Schouler's NYFW show in a form-fitting knit skirt-and-sweater combo, which she paired with black tights and booties and topped with a black-and-white plaid coat.

12 of 14

February 10, 2016

WWD/REX/Shutterstock

Tyler showed off her long legs in a black mini, tights, and a warm coat at the Belstaff pop-up store in N.Y.C.

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January 17, 2016

Jason Merritt/Getty

The expecting actress was elegant in a simple black gown at the 2016 Critics' Choice Awards just days after announcing her third pregnancy.

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Celebrate Liv Tyler’s 39th Birthday with Her 13 Best Maternity Looks