Molly Sims is pregnant and expecting her second child with husband Scott Stuber Credit: Frazer Harrison/Getty Images

Sims is seeing two! Molly Sims is pregnant and expecting her second child with producer husband Scott Stuber, the actress revealed on her personal blog on Tuesday, Sept. 30. The couple are already parents to 2-year-old son Brooks.

Sims posted a sweet snapshot via WhoSay of her and her baby boy sitting outside their home. She held a chalkboard with "4 months" written on it as Brooks had one that read "2 years" for his age.

"I can't even [begin] to explain just how excited we are for a new baby. We are so, so, so blessed as a family, and I'm speechless at the fact that we have the opportunity to bring a second bundle of joy into the world," Sims wrote. "I absolutely cannot wait to see what life will be like as a mother to a toddler and a newborn, and I really can’t wait to see Brooks as an older brother to Baby #2!"

"I just know that he's going to be preciously protective," she continued. "If it's a girl, he'll be her biggest supporter and confident and if it's a boy, I know they'll be the best of friends, always getting into adventures together."

The model, 41, spoke to Us about wanting to have another child while attending the Gymboree and Eric Carle Collection Launch Event And Book Reading in L.A. on Sept. 5. "We are trying! Which kind of is the fun part of it, I'm getting ready," she said at the time.

"[Brooks] just turned 2. We decided to wait because I really wanted to enjoy him," she added. "And I got married. I got engaged, had a baby, all in a year and a half. It's been amazing, but I think we're on our way."

Sims and Stuber (currently filming Ted 2) got engaged in May 2011 after dating for over a year. They wed that September at the Frank Cafferata Vineyard in Napa in front of famous pals like her former Las Vegas costar Josh Duhamel, Fergie, and Vince Vaughn.

Us broke news in June 2012 that they welcomed son Brooks. Last October, the blonde star told Us she "didn't realize" her baby boy was playing with David Beckham's daughter Harper when the four were photographed together in a NYC park.