Post-it is putting up giant yellow notes around London wishing Prince William and Kate Middleton a long and happy marriage together. Because, you know, nothing says permanence quite like a Post-it note. "May you stick together forever. Congratulations," says copy on the wall next to the notes. The tagline is: "Holds stronger and longer." The campaign, by OgilvyAction, went live on Sunday and will run for two weeks in various sites across London. Helene Manga, brand manager at 3M, says: "We couldn't say no to the campaign. The royal wedding is spreading cheer throughout the nation as millions, even billions of people across the world gear up for this wonderful celebration. OgilvyAction has placed Post-it Super Sticky Notes at the heart of the event with a humorous campaign that has as wonderfully light touch." If Manga was invited to Friday's wedding, she's now surely been uninvited. Full image after the jump. Via Ads of the World.