Kate and William attended the Governor-General's reception [GETTY]It is thought to be the first time Kate has worn something by American Lela Rose, who is a hit with celebrities such as Jessica Simpson, Selma Blair and Mary-Kate and Ashey Olsen.The white circle lace trim dress by Lela Rose retails at ??869 [PH]The white circle lace trim dress, which retails at ??869, features a graphic effect to t