James Middleton and new wife Alizee Thevenet have made a rare joint appearance as newlyweds as they supported James' sister, the Duchess of Cambridge, as she hosted a carol concert.READ: Why Kate Middleton is set for a special month in JanuaryThe Together At Christmas carol service was hosted and spearheaded by the Duchess, and supported by The Royal Foundation, to pay tribute to the incredible work of individuals and organisations across the UK who have supported their communities through the