Nick Lachey Vanessa Lachey - LEAD

Nick and Vanessa Lachey were spotted having a dinner date in West Hollywood, Calif., last night, where they coordinated in fall-ready outfits.

For their evening out, Vanessa showed off her growing baby bump in a boho chic dress that featured ruffled layers, a groovy print, and revealing keyhole neckline. She topped off her winning maternity outfit with a pair of black suede over-the-knee boots, a textured leather crossbody bag, and a pair of simple diamond stud earrings. The mother to be styled her long brunette strands in a trendy half down topknot. Nick also kept it neutral in a black and white plaid shirt that he paired with gray trousers, black leather boots, and a matching watch.

The married duo announced last month that they are expecting their third child together with an adorable Instagram photo. The stars are already parents to a 4-year-old son named Camden and a 1-year-old daughter named Brooklyn.

VIDEO: The Cutest Celebrity Kids on Instagram

We wish this growing family all the best.