FIRST PIC: See Kimberly Stewart's Baby Bump!

Credit: SPW/Splash News Online

What a bump!

Kimberly Stewart, 31, showed off her growing baby belly while dining with her brother Sean at Il Sole Restaurant in West Hollywood on Wednesday. Wearing a flowing maxi-dress, the mom-to-be attempted to shield her belly with her fringe purse as she left the California hot spot.

The actress, model and daughter of legendary rocker Rod Stewart, 66, is currently expecting her first child with Oscar winner Benicio del Toro; the two are not in a relationship.

"Benicio is the father and very supportive," his rep told Us Weekly on April 11. "Although they are not a couple, they are looking forward to the arrival of the baby."