Credit: Ethan Miller/Getty Images for Pure Nightclub

Bachelorette baby on board!

Shayne Lamas and husband Nik Richie are expecting their first child! "The Lamas-Richie family is happy, healthy and definitely pregnant," the Bachelor Season 12 winner, 24, Tweeted early Wednesday.

A few hours earlier, Richie teased that she had been "M.I.A. working on a beautiful new project in my life and I can't wait to show the world. Soon."

Lamas then showed off her baby bump -- in a bikini -- in a sultry pregnant pic on TMZ.

Within hours of meeting one another in April 2010, Lamas and Richie (co-founder of celeb site wed at the famed Little White Wedding Chapel in Las Vegas.

The daughter of actor Lorenzo Lamas (who reportedly weds this weekend!) and co-star on E! reality show Leave It to the Lamas was briefly engaged to Bachelor star Matt Grant, but called it off in July 2008.