The Queen is hoping the royal baby is born soon - because she is about to go on holiday.
She made the comment in reply to a question from a 10-year-old schoolgirl while on a series of engagements in the Lake District.
Fay Batey, a pupil at Wiggonby CofE Primary School, asked: "Do you want Kate's baby to be a boy or girl?"
The Queen joked: "I don't think I mind. I would very much like it to arrive. I'm going on holiday."
Fay told reporters it was "really, really exciting" to speak to the Queen.
She and fellow pupils waved Union flags and cheered as the royal party arrived at the Brockhole Lake District Visitor Centre on the shores of Lake Windermere.
The Queen's final engagement before her holiday is next Tuesday.