It's not only Prince William and Kate who are getting married - otters Isla and Lewis have tied the knot at their home at the Scottish Sea Life Sanctuary near Oban too.
Four-year-old Isla and Lewis - named after Scottish islands - are the only pair of Canadian Otters in Scotland. They arrived at the sanctuary in 2008 and have since been inseparable.
Staff dressed up and waved Union Jack flags during the ceremony. They even had a wedding cake...
...with a bride and groom otter on top of course!
"They do have spats every now then, normally over sharing - or not sharing - their food," says sanctuary boss Craig. But Lewis is also very protective over Isla.
They would live up to seven years on average in the wild, but in their sheltered dwelling at the sanctuary, the otters should live between 15 and 20 years.