Pregnant Jessica Simpson & Co. Attend Zelman/Harrison Rehearsal Dinner

Posted Saturday March 24, 2012 7:48 AM GMT

Drawing quite the impressive guest list as they ready for their big walk down the aisle, Lauren Zelman and Bret Harrison celebrated with family and friends during their rehearsal dinner in Palm Springs, CA on Friday night (March 23).

Held on the eve of their wedding day, the soon-to-be newlyweds held the event at Las Casuelas Nuevas with over 100 guests including pregnant singer/actress Jessica Simpson and fiance Eric Johnson turning up to support the couple.

Clad in a bump covering green maternity gown, the "Dukes of Hazzard" darling showed off her warm smile as she eased her way inside the Mexican eatery while arm-in-arm with her man.

Also on-hand for Zelman and Harrison's rehearsal dinner was Jessica's younger sister, Ashlee Simpson, as well as actor Adam Brody and recently engaged couple CaCee Cobb and Donald Faison.