Commemorative coins are being minted to mark the christening of Prince George and will be priced at between £13 and £50,000.
In an announcement by Royal Mail, it advised that twenty-two of the most expensive coins will be struck containing a kilogram of gold each.
This is the first time that a royal christening has been commemorated in such a way.
The coins are being struck from today (Tuesday 8th October) at the Royal Mint in Llantrisant, Rhondda Cynon Taf.
They feature a lily font from the Tower of London, which has links with royal christenings. The inscription is flanked by two harp-playing cherubs. The motto at the foot of the coin is the traditional "Dieu et mon droit" or "God and my right", which is the motto of Prince George's great grandmother, the Queen.
The prince has already had coins minted in his honour - the Royal Mint gave away 2,013 silver pennies to babies born on the same day.