Guests planning to take the Circle Line to Westminster Abbey for tomorrow's royal wedding can pay using a special commemorative William and Kate Oyster card.
Transport for London has made around 750,000 wedding Oyster cards available at stations in the capital over the last week. The £5 deposit and £5 minimum top-up will apply as normal.
Mayor of London Boris Johnson says: "Just as royal wedding fever starts to take hold in the city, this fantastic commemorative Oyster card is a great chance for Londoners and visitors to have a slice of the action as a fabulous memento of the happy day."
TfL's predecessor London Transport produced a special, old fashioned, ticket in 1981 to mark the marriage of William's parents, Charles and Diana.