Harry & Meghan's Windsor Knot has been brewed to give the traditional British pint American froth for the nuptials of the transatlantic couple, who will marry at royal residence Windsor Castle home on May 19.
"With the authenticity of being brewed in Windsor in the shadow of Windsor Castle, using local ingredients, it has got a fantastic appeal," reckons Will Calvert, 60, a director of Windsor and Eton brewery.
The brewer says the pale ale is made from barley from Windsor's royal farm and combined with hops from the US west coast, reflecting Markle's heritage.
It is a sequel to the Windsor Knot beer the brewery made in 2011 to mark the wedding of Prince William, Harry's elder brother, to Kate. That brew was supposed to be on sale for a couple of months, but it was such a hit that it's still being made and sold today.