Three of the gowns were made by British dressmaker Catherine Walker, Diana's favourite designer and close personal friend, and are expected to fetch between USD 60,000 and USD 80,000 each.
The first is an off-the-shoulder petal pink gown embellished with bands of simulated pearls, faceted glass and beadwork, the house said yesterday.
Also on offer is a strapless ivory silk crepe dress and a chartreuse silk georgette gown worn by Diana in 1993.
The dresses, along with other Diana-related items, will go under the hammer at Julien's Auctions in Beverly Hills on December 5 and 6.