Ocean State Job Lot, a discount retailer, plans to open its doors this afternoon, according to its Facebook page and a sign in its window.
The new store takes over the space and fills out the shopping complex at 90 River St.
A grand opening is scheduled for July 12, according to the Facebook page.
Ocean State is the latest in a series of stores or restuarants coming to Waltham including , and have all announced new locations in Waltham. The proposed development at the former Polaroid site includes plans for retail stores.