The whole world was watching on Saturday as Meghan Markle and Prince Harry tied the knot at St. George's Chapel at Windsor Castle in England. While many were focused on what the couple and attendees were wearing, including Markle's Givenchy wedding dressed designed by Claire Waight Keller and David Beckham's insanely sharp three-piece suit by Kim Jones at Dior Homme, some of the world's biggest brands took the opportunity to create clever marketing campaigns.

KFC, the fast-food chain that practically wrote the book on what it means to be a relevant restaurant on social media, introduced Kentucky Fine China. The bone china buckets were actually available for purchase on the day of the wedding, although they were produced in extremely limited qualities - 25 available via its app and 50 cardboard versions available from KFC's Windsor branch.

Dunkin Donuts, meanwhile, hopped on Instagram to share its #RoyalLoveDonut, the perfect treat for a royal wedding viewing party.

Bud Light spinoff Lime-a-Rita made a bold attempt to introduce an official hashtag for the royal wedding with #HarryMakesHisMarkle. The campaign invited social media followers to use the Lime-A-Rita hashtag generator and follow its Twitter handle @TheRitas for a play-by-play of the wedding from Real Housewives’ Nene Leakes.

Take a look at more campaigns over at AdWeek and see some of our favorite Instagram posts from the big day below.