Millie Mackintosh has shown off her incredible post-baby body in a gorgeous new photo with her newborn daughter Sienna.The 31 year old gave birth to her first child with husband Hugo Taylor, 34, in May. Former Made In Chelsea star Millie recently announced that Sienna has been diagnosed with hip dysplasia, a condition that sees the ball and socket joint fail to develop properly in babies, meaning the hip can easily become dislocated.