Mother of the bride Carole Middleton arrives at Westminster wearing powder blue
According to Clarence House, Prince Charles' official office:
Mrs. Carole Middleton is wearing a sky blue wool crepe coatdress with matching satin piping and passementerie at the waist and cuff over a sky blue silk shantung 'Sydney' day dress with short pleated sleeves and pleated pockets. The dress and coatdress are by Catherine Walker. Mrs. Middleton's hat is by Berkshire-based Jane Corbett.
According to BBC America, designer Catherine Walker (who died in 2010) was a favored designer of William's mother, Princess Diana. A fitting tribute.
Prince Charles' wife, Camilla Parker-Bowles, in an Anna Valentine dress, and Philip Tracy hat:
And the Princesses Eugenie and Beatrix -- daughters of Prince Andrew and Sarah Ferguson: