Prince William Leaves Hospital: I Need Some Air

Soon-to-be dad Prince William just took a big breather in London, finally exiting the hospital where his preggo wife Kate Middleton is being treated for severe morning sickness.

William left the King Edward VII hospital moments ago with his royal entourage. The guy's been there since Kate was admitted earlier yesterday.

As reported, the Royal Palace made the big announcement yesterday morning -- Kate is in the "very early stages" of pregnancy.

Wearing a collared shirt under a basic gray sweater, Wills looked calm as he made his way out of the medical facility.

Although Kate isn't feeling great right now, the palace said in a statement she's only expected to remain in the hospital for a few days and will then rest at home.

"The Queen, the Duke of Edinburgh, the Prince of Wales, the Duchess of Cornwall and Prince Harry and members of both families are delighted with the news," the palace said.

We're delighted too, and hope the duchess is feeling better very soon.