The Blick tabloid said Mosimann – who runs a London restaurant and whose “cuisine naturelle” has found favour with the Prince of Wales – had sent congratulations, and a parcel, to “Boy George”.
“I send my best wishes to Catherine and William on the birth of their wonderful son,” the paper quoted the Biel chef as saying.
“A present is on its way. What it is, I can’t say, of course.”
The 66-year-old restaurateur who runs a private dining club called Mosimann’s was chosen to prepare the banquet for William and Kate at their wedding on April 29th, 2011.
Mosimann also told the paper he had devised a special menu for the new royal parents.
“For a celebratory meal I would recommend Scottish smoked salmon followed by saddle of lamb. For dessert I would serve my own bread and butter pudding,” Mosimann said.
It was announced on Wednesday that the royal prince had been named George Alexander Louis. The name George has a long tradition in the British royal family and was the bookmakers’ favourite.
A Swiss businessman registered the name of the royal baby as a website address before it was even announced to the public, local media reported.
Luc-Andre Biggs registered georgealexanderlouis.com on Wednesday morning, just hours before the announcement of the infant prince's name, after consulting a list of possible combinations used by bookmakers in Britain, the weekly Handelszeitung reported.
Biggs, 32, has made a living of guessing the addresses of websites that will become popular before selling them on to clients.
By registering the name of the Duke and Duchess of Cambridge's son, the former estate agent adds another address to the 600 he already owns.
Biggs's company, Key Domains, has made use of the same tactic for the past seven years from its base in Portugal.