The actress, model, and author — already mom to son Brooks Alan, 2 1/2 — will be learning the sex of her second baby.
“We’re going to find out soon, like in two weeks, three weeks. We’re excited,” she told PEOPLE at Old Navy + Novogratz This Is Family event at Fig & Olive in West Hollywood.
Although Sims, 41, has a lot to be excited about, she knows that she has difficult pregnancy days waiting for her just around the corner.
“I’m feeling good. I’m six months so I’m in the honeymoon [phase], which is slowly going to end soon,” she shares. “I call it the dark days.”