Britain's Prince Harry, Duke of Sussex (R) and US actress Meghan Markle (L) stand facing each other hand-in-hand before Archbishop of Canterbury Justin Welby (C) during their wedding ceremony in St George's Chapel, Windsor Castle, in Windsor/ AFP

Britain's Prince Harry and Meghan Markle were today pronounced man and wife at the iconic St George's Chapel in Windsor Castle where the couple exchanged wedding vows in the presence of 600 guests as millions of people around the world watched the historic event.