They also revealed the couple’s Bridesmaids and Page Boys for their big day, which include William’s Godchildren Grace van Cutsem and Tom Pettifer, and his young cousin Louise Windsor, daughter of Prince Edward.
A statement released today said: “Miss Catherine Middleton has asked her sister, Miss Philippa Middleton, to be her Maid of Honour.
“Prince William has asked his brother, Prince Harry, to be his Best Man.
“Prince William and Miss Middleton have chosen the following Bridesmaids and Page Boys:
“The Lady Louise Windsor (aged 7 – daughter of The Earl and Countess of Wessex).
“The Hon. Margarita Armstrong-Jones (aged 8 – daughter of Viscount and Viscountess Linley).
“Miss Grace van Cutsem (aged 3 – daughter of Mr. and Mrs. Hugh van Cutsem).
“Miss Eliza Lopez (aged 3 – daughter of R. and Mrs. Harry Lopes).
“Master William Lowther-Pinkerton (aged 10 – son of Mr. and Mrs. Jamie Lowther-Pinkeron).
“Master Tom Pettifer (aged 8 – son of Mr. and Mrs. Charles Pettifer).”
The Bridesmaids and Page Boys’ outfits will be revealed on the big day in April.