Prince William visits Kate at the hospital

Britain's Prince William leaves the King Edward VII hospital where his wife Kate, the Duchess of Cambridge, was admitted with a severe form of morning sickness on Dec. 3, 2012. St. James's Palace announced on Monday that Britain's Duchess of Cambridge, formerly known as Kate Middleton, is pregnant and has a severe form of morning sickness for which she is being treated at a London hospital.

Credit: AP Photo/Sang Tan