Kate Middleton's younger brother is about to be a dad! James Middleton took to Instagram on Wednesday and shared that he and his wife, Alizee, are expecting a baby.«We couldn’t be more excited … well Mable might be ❤️,» the proud dog dad wrote in his caption. «It was a very difficult start to the year after losing my beloved Ella however we will end the year with the most precious little addition to our growing family ❤️.»Ella was James' Cocker Spaniel, who died in January. In the post, James posted two photos of Alizee and the couple's doggies as she shows off her baby bump. A post shared by James Middleton (@jmidy)The baby news comes nearly two years after Kate and Pippa Middleton's younger brother tied the knot in France.