The Duke's sense of humour has evidently not been damaged by his recent illness.
Asked outside the hospital if he was feeling better, Philip replied: "Well, I wouldn't be coming out if I wasn't."
Having been released from hospital on Saturday afternoon the Duke of Edinburgh will be spending his 91st with his family.
The Duke of Edinburgh left King Edward VII Hospital in London today in time for his 91st birthday.
The Duke of Edinburgh is still in hospital. He may not be released until after his 91st birthday this Sunday.