The two announced their engagement after dating for at least 15 months.
The announcement comes three weeks after the couple confirmed their engagement last month and said the ceremony would take place at St George's Chapel in Windsor Castle.
The couple will spend the day at a World AIDS Day charity fair organised by the Terrence Higgins Trust and then meet Headteachers of a local school, Nottingham Academy.
In their first interview as a couple, the royal and his blushing bride to-be reveal details about their romance, meeting of the families and that oh so important ring.