Kate 'feels morning sickness will go on forever'

Kate Middleton has said she feels that her morning sickness will "go on forever".

The 30-year-old royal and her husband Prince William announced they are expecting their first child together earlier this week after Kate was admitted to hospital for acute morning sickness.

After she was discharged on Thursday, William has joked about the misleading name of his wife's recent illness.

Speaking at the Winter Whites Gala in Earls Court, London, for homeless charity Centrepoint - which he is a patron of - William said: "I don't know why they call it morning sickness - they should call it all day and all night sickness. It's a long old process but she is getting there. She feels like it is going to go on forever."

The prince was to originally attend the event with Kate, but the duchess has cancelled all her royal engagements leading up to Christmas and has been given strict instructions by staff at London's King Edward VII hospital to rest and stay hydrated.