As the expecting Mummy and Daddy, William and Kate are the most important "players" in the royal baby extravangaza (besides, of course, their new addition). William was by Kate's side for Prince George's birth, and he'll be with her in the delivery room of St. Mary's Hospital this time around as well. All eyes will be on the couple when they unveil their newborn to the world in front of St. Mary's, and bets on Kate's first post-birth ensemble and William's skills at putting in a car seat (he's got lots of practice now!) are welcome.