Irish bookmaker Paddy Powers said, "We had to suspend betting. We saw an almost identical pattern of betting before the announcements of the couple's engagement and pregnancy."
"An unprecedented amount of bets on Meghan and Harry to have twins has forced us to stop taking bets on the market altogether this morning."
"Since the day began, the stream of bets has led us to believe that perhaps the punters - or an insider source - knows something more than we do."
The news follows Prince Charles stirring the pot, hinting at a few baby name options for his son and daughter-in-law's first born.
“My son Harry tells me that during their recent tour of Australia he and his wife were offered thoughtful suggestions for the naming of their baby,” the Prince of Wales shared.
"Just between us, I suspect Kylie and Shane may possibly make the shortlist," he jokingly told the audience.
"But ladies and gentlemen I would not hold your breath for Edna or Les."