Roy Wood, of the Cross Keys, Upton, Nottinghamshire, has decided to offer drinks at 1981 prices for the royal wedding.
"Everyone is doing themed pies and drinks, so I thought of a way of linking it with the year of Diana's wedding," says Wood.
Punters get a royal wedding token when they buy their first drink at full price, to get a second beer, wine or soft drink at the price it was in 1981. This could be a pint for 62p.
The pub will also be decorated with bunting and offer special-edition ale Kiss Me Kate. Wood is marketing the idea close to the 29 April event to gain greater impact, adding: "Otherwise, people can forget what's going on or another pub may come up with a better idea."
He said: "We're always doing something."