The 37-year-old actress revealed the exciting news by showing off her adorable baby bump for the first time at the AG + Vanity Fair Opening of Saved in Los Angeles on Thursday, which she attended with her tattoo artist husband, Scott Campbell.
Dressed in a body-hugging LBD, Bell was glowing as she cradled her burgeoning belly while posing for photographers.
Campbell perfectly complemented his lady's look in a pair of black pants and a black-and-gray button-down shirt.
Campbell and Bell originally met on the set of How to Make It in America, and tied the knot at the Marigny Opera House in New Orleans, Louisiana, in June 2013. The two are also parents to 2-year-old daughter Nova.