Still riding the high of her engagement announcement, Kate attended the wedding of friends Harry Aubrey-Fletcher and Sarah Louise Stourton, the day before her 29th birthday. The princess-to-be recycled the daring Issa dress she first wore to Peter & Autumn Phillips' wedding, and debuted the velvet Libélula coat that remains a fan favorite today. This was one of her first engagements where we saw Kate Middleton with PPOs, as her life changed from commoner to HRH.