Alan Alger, a spokesperson for Betway revealed: "There were a few rumours circling around that Meghan Markle and Prince Harry were expecting twins and we went 10/1 on it happening at the start of the year.
“However, we’ve seen plenty of support on the couple welcoming two new members to their family in recent days and have had to cut the price in half to 5/1 as a result."
Alice and Victoria are listed as favourites when it comes to names for the new royal bub, followed by James and Albert for a baby boy.
It is believed the former actress is due to give birth at the end of April to early May, after she told one well wisher at an event in January that she was six months along.
The 37-year-old is showing no signs of slowing down, as the royal couple attended the Endeavour Fund Awards on Thursday night and recently announced plans to visit Morocco from Feb. 23 through the 25.