Prince William and Kate Head To London With A Police Escort.

Could it be? Is it time? Reports say that William and Kate abruptly left her family's home in the English countryside with a police escort at 3pm London time today!

Waiting.......

Whether the Duchess is headed for St. Mary's Hospital -- or simply back home to Kensington Palace -- remains to be seen.

 The Prince has not yet begun his paternity leave, but is simply taking time off to await the birth of his first child.