As Harry was leaving the twelfth annual Lord Mayor’s Big Curry Lunch, he was asked by the wife of a servicemen if he was looking forward to becoming a dad.
He revealed: 'Of course I am excited, very excited.'
This was the first event of the day for Harry, who who later that day is due to attend the premiere of Our Planet with his father Prince Charles and brother Prince William.
The heavily pregnant Duchess of Sussex was not in attendance as she's started her maternity leave from royal engagements.
Watch William and Harry join Charles for a rare joint engagement at Our Planet premiere: