Adele Geras 
Peas In A Pod 

Stella-across-the-road is getting married — with a wonderful, romantic wedding. It»s a dream come true for Jo, who is sure she and her sister Lily will be Stella»s bridesmaids. But although the two girls look just like each other — like two peas in a pod — they are very different. Lily hates silly, frilly dresses and doesn»t want to be a bridesmaid. Can both sisters find a way to enjoy the wedding?
Peas in a Pod is the second tale about Jo and Lily. Also available is Chalk and Cheese.