While there's no rules on christening outfits for women, the celebrations do have an unwritten dress code of men wearing suits, or at least smart trousers and a shirt, and female christening guests ...
Unlike the royals, many parents in the UK now choose to dress up their little ones in "smart" but less formal clothing which has led to sales of traditional christening gowns going down.
The royal stepped out at Mallorca Cathedral to attend the christening of her marital cousin ... across her waist and skirt. Her striking dress - the 'Claudia' from royally-loved brand Saloni ...