Rachel Allan 70789 stretch tulle, beading prom dresses are offered in Black Multi, Champagne Silver, Royal Multi. $798 is the Formal Approach best price guarantee for style 70789 by Rachel Allan. Shop with confidence, Formal Approach is an authorized Rachel Allan prom dress store. Rachel Allan 70789 is offered in the following sizes: 00, 0, 2, 4, 6, 8, 10, 12.