The 33-year-old star who is set to wed the former NFL player, 34, on July 4, has booked Santa Barbara's Bacara Resort & Spa for now, reported Us magazine.
"But Jess keeps going back and forth on locales," a source said. The actress, however, has checked off other details from her wedding list. "The wedding will be very rustic-chic," the source added. Her guest list has also been finalised.
Simpson got engaged to Eric Johnson in November 2010 after dating for six months. The couple has a daughter Johnson and a son.