As blogged last year, Kulveer Ranger, the Mayor’s transport adviser, said "We want to help celebrate the fantastic occasion that will be the royal wedding. It's a good way to bring a level of excitement and ingenuity to something we rely on every day."
The official design has just been unveiled by TfL. The £5 deposit and £5 minimum top-up will apply as normal for the card and it will be available from 21 April 2011. I'm sure you'll also see plenty for sale on eBay.
It will be the first "limited edition" Oyster card ever to be put on general release.
Meanwhile if you're after a Royal Wedding tea towel, London Transport Museum have just produced one that is fairly subtle. Designed by Maria Holmer Dahlgren, it has Kate & William's initials carved in a tree. You'll also see I DO highlighted in the words In London, which is actually reasonably tasteful.
If you've seen any other transport related Royal Wedding items, let us know.