Molly Sims is one busy mommy-to-be!

The Sports Illustrated swimsuit model looked fit and fabulous in stretch pants and a bright pink zip-up, as she struggled to juggle her bags around her baby bump, after picking up her pet Yorkie from the Vet's office, on Thursday afternoon.

Sims makes sure to keep her fans updated on the details of her pregnancy via MollySims.com, and she recently shared, "It's hard for even me to believe! The baby just started kicking and at this point it's only a matter of weeks until life as I know it is going to completely change – and I can't wait!"

The stunning supermodel has so far kept mum on the baby's sex, saying only, “He’s here. She’s here. We don’t know! Can you guess?”

Molly Sims is typically spot-on with her fashion, but the pregnant Project Accessory host has us questioning her decision to wear pink heels over black tights. Yikes!

The expecting model, who rocked a very flowy and colorful dress, hid her baby bump quite well ... except when she turned to the side.

We love how Molly is comfortable going out with not a stitch of makeup on her face. What a natural beauty!

Who's got the hotter baby bump? Do you prefer Kristin Cavallari's sporty style or Molly Sims' maternity chic?

Molly Sims seems to be enjoying her first pregnancy and a little shopping in the process!

The 38-year-old Project Accessory host, wearing a flowy maxi dress, hits the shops in Beverly Hills sporting a tiny baby bump.

Sims is already 17 weeks along. As for her pregnancy cravings, she said the following:

“I’ve already been though the morning sickness (every morning from 4 to 6 AM for seven weeks—it was the worst), the strange cravings (I’m looking at you, Kraft Easy Mac) and daily episodes of what I call ‘pregnancy brain.’ But believe it or not, I’m cherishing every moment."

Looking good, Molly!

Molly Sims has only been married for four months, and already the supermodel and host is pregnant with her first baby, according to Life & Style.

A source close to the couple tells the mag:

"She's very happy. She's wanted to be a mom for a long time."

Sims, 38, tied the knot with film producer Scott Stuber, 43, in a Napa Valley ceremony last September.

The stunning host of Project Accessory told L&S just last month, "[I want to have] as many [children] as I can have."

Well, Molly ... this is a great start!

Molly Sims has tied the knot with producer Scott Stuber.

Stuber and Sims dated for a year-and-a-half before he popped the big question in May. The couple exchanged vows in front of friends and family in Napa Valley, Calif., on Saturday, her rep confirms.

Sims, 38, wore a dress by Marchesa and jewels by Lorraine Schwartz, while her man, 42, sported a suit by Tom Ford. Guests, including Vince Vaughn and Josh Duhamel and wife Fergie, enjoyed red velvet cake at the reception.

Sims has never been married, while Stuber is once-divorced, but one thing the couple do share? Work ethic! Sims, a supermodel-turned-actress, is next hosting Project Runway spinoff Project Accessories. Stuber, who has produced flicks like The Break-Up and Role Models, has 40 projects -- yes, 40 -- in the works!

Gwyneth Paltrow and model Molly Sims looked bronzed and beautiful while attending the 3rd annual Bent on Learning Benefit at the Urban Zen Center in New York City.

Bent on Learning offers yoga instruction and meditation to students in grades K through 12 in NYC public schools and youth centers. Their goal is to improve self-esteem, concentration and reduce stress. We bet Gwyneth's kids Apple and Moses are yoga pros!

Great to see these two beauties supporting such a great cause. Namaste.

See more of Gwyneth in her stunning grey draped dress ... after the jump.

Gorgeous model/actress Molly Sims is getting married!

Sim's new fiancé, Love and Other Drugs producer Scott Stuber, popped the question after dating the beauty for a year-and-half.

Stuber put a ring on it the weekend of May 20, and even flew his soon-to-be in-laws to Los Angeles for the special event!

This is the second marriage for the film producer, who's marriage to Star Trek actress Rachel Nichols lasted just seven months before the pair separated in 2009. Sims had a previous relationship with Aaron Eckhart; they split in 2009.

The former Sports Illustrated cover girl is currently starring in the TV movie Shredd, and has been hard at work on her new jewelery line Grayce by Molly Sims.