Pubs could be given permission to party into the early hours when Prince Harry marries Meghan Markle.
The government is consulting on extending hours for all pubs and bars to 1am on the weekend of Friday May 18 and Saturday 19.
It is also the weekend of the FA Cup finals in Scotland and England which could lead to bumper days of business.
Previously, pubs have been allowed to open for longer for royal events such as the Queen's 90th birthday in 2016 and the wedding of Prince William and Kate Middleton in 2011.
British Beer & Pub Association chief Brigid Simmonds welcomed the move.
"This is great news for pubs and pub-goers and shows the government has listened to our calls to put pubs at the heart of the Royal Wedding celebrations.
"Visitors see the Great British pub as a cultural icon, almost as much as the Royal Family. Extended hours would give a £10million boost to the trade and make the most of the expected increase in tourism."
Association of Licensed Multiple Retailers boss Kate Nicholls said: "Extended trading for the wedding will provide a welcome boost to the UK's pubs, restaurants, hotels and bars, so a proposal to extend trading hours is a sensible step by the government and should provide customers and businesses with a chance to celebrate."