As Kate Middleton left a London hospital Thursday, Prince Charles said he was "thrilled" at becoming a grandfather.
The BBC reported Prince Charles also showed he has a sense of humor regarding the prank call made by an Australian radio station to the London hospital where the Duchess was being treated for severe morning sickness.
When a BBC reporter approached Prince Charles to ask him about the royal baby news, he gave a hearty laugh, saying: "How do you know I'm not a radio station?"
He then added that he was very happy about a new addition to the royal family.
"I'm thrilled. It's marvelous. It's a very nice thought of grandfatherhood in my old age. So, that's splendid. And, I'm very glad my daughter-in-law is getting better — thank goodness."
Middleton, who is less than 12 weeks pregnant, left London's King Edward VII Hospital at 11 a.m. GT Thursday with Prince William.
ABC News reported she was then driven to Kensington Palace for a period of rest, St James's Palace said.
Looking happy and relaxed, Middleton emerged from the hospital holding yellow flowers and waved to the crowd as she was driven off in a black car.
The Daily Mail reported the Duchess, who has been suffering acute morning sickness, wore a navy coat and knee-high black suede boots.
The newspaper said that as she posed briefly for the waiting press, she told reporters: "I'm feeling much better, thank you."
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The Duchess's appearance came as the controversy over the hoax call by an Australian radio DJ that duped a nurse into revealing details about her health continued.
The palace was careful to ensure all information released on Thursday was authorized.
"The Duchess of Cambridge has been discharged from the King Edward VII Hospital and will now head to Kensington Palace for a period of rest," Nick Loughran, the assistant press secretary to the Duke and Duchess of Cambridge, said in a statement.
"Their Royal Highnesses would like to thank the staff at the hospital for the care and treatment The Duchess has received."